Reverted to forward rendering, added default values for uniforms

assets/shaders/blinn_phong.frag

@@ -0,0 +1,87 @@
+//include common.glsl commonFrag.glsl version.glsl
+
+struct Light
+{
+	vec3  position;
+	float outer_angle;
+	float inner_angle;
+	float falloff;
+	float intensity;
+	vec4  color;
+	uint  pcf_enabled;
+	int   type;
+	int   radius; 
+	float depth_bias;
+};
+
+const int LT_SPOT    = 0;
+const int LT_DIR     = 1;
+const int LT_POINT   = 2;
+
+const int MAX_LIGHTS = 128;
+
+uniform vec3 camera_pos;
+
+uniform sampler2D diffuse_texture;
+uniform Light lights[MAX_LIGHTS];
+uniform int total_active_lights;
+
+uniform float specular;
+uniform float diffuse;
+uniform float specular_strength;
+
+out vec4 frag_color;
+
+vec4 calc_point_light(in Light point_light)
+{
+	vec4  diffuse_comp  = vec4(0.0);
+	vec4  specular_comp = vec4(0.0);
+	vec3  light_direction = vertex - point_light.position;
+	float dist = abs(length(light_direction));
+
+	if(dist <= point_light.radius)
+	{
+		light_direction = normalize(light_direction);
+		vec3 normalized_normal = normalize(normal);
+		float cos_ang_incidence = dot(normalized_normal, -light_direction);
+		cos_ang_incidence = clamp(cos_ang_incidence, 0, 1);
+
+		if(cos_ang_incidence > 0)
+		{
+			diffuse_comp = point_light.color * diffuse * cos_ang_incidence;
+			vec3 vertex_to_eye = normalize(camera_pos - vertex);
+			vec3 light_reflect = normalize(reflect(light_direction, normalized_normal));
+			float specular_factor = max(0.0, dot(vertex_to_eye, light_reflect));
+			specular_factor = pow(specular_factor, specular_strength);
+			specular_comp = point_light.color * specular * specular_factor;
+		}
+		float attenuation = pow(max(0.0, (1.0 - (dist / point_light.radius))), point_light.falloff + 1.0f);
+		return (((diffuse_comp + specular_comp) * attenuation) * point_light.intensity);
+	}
+	else
+	{
+		return vec4(0.0);
+	}
+}
+
+void main()
+{
+	vec4 albedo_color = diffuse_color * texture(diffuse_texture, uv);
+	vec4 light_contribution = vec4(0.0, 0.0, 0.0, 1.0);
+	
+	for(int i = 0; i < total_active_lights; i++)
+	{
+		if(i == total_active_lights) break;
+
+		// if(lights[i].type == LT_POINT)
+		light_contribution += calc_point_light(lights[i]);
+	}
+	
+	 frag_color = (albedo_color * vec4(0.1, 0.1, 0.1, 1.0)) +
+		          (albedo_color * light_contribution);
+	//frag_color = lights[0].color;
+	//frag_color = vec4(lights[0].intensity, 0.0, 0.0, 1.0);
+	//frag_color = vec4(lights[0].position, 1.0);
+	//frag_color = vec4(camera_pos, 1.0);
+	//frag_color = vec4(total_active_lights);
+}

assets/shaders/blinn_phong.vert

@@ -0,0 +1,7 @@
+//include commonVert.glsl version.glsl
+
+void main()
+{
+	gl_Position = transformPosition(vPosition);
+	setOutputs();
+}

assets/shaders/common.glsl

@@ -2,4 +2,4 @@
 // Common Uniforms
 // uniform vec4 ambientLight;
 // uniform vec3 eyePos;
-uniform vec4 diffuse_color;
+uniform vec4 diffuse_color;

assets/shaders/commonVert.glsl

@@ -27,6 +27,8 @@ void setOutputs()
 	//Normal and vertex sent to the fragment shader should be in the same space!
 	normal = vec4(model_mat * vec4(vNormal, 0.0)).xyz;
 	vertex = vec4(model_mat * vec4(vPosition, 1.0)).xyz;
+	// normal = vNormal;
+	// vertex = vPosition;
 	vertCamSpace   = vec4(view_mat * vec4(vPosition, 1.0)).xyz;
 	vertLightSpace = vec4((lightVPMat * model_mat) * vec4(vPosition, 1.0));
 }

assets/shaders/fbo.frag

@@ -4,17 +4,13 @@ in vec2 uv;
 
 out vec4 frag_color;
 
-//uniform sampler2D sampler;
 uniform sampler2D albedo_map;
-uniform sampler2D position_map;
-uniform sampler2D normal_map;
-uniform sampler2D uv_map;
+//uniform sampler2D light_map;
 
 void main()
 {
-	//frag_color = texture2D(sampler, uv);
-	frag_color = texture(albedo_map, uv);
-	frag_color = texture(position_map, uv);
-	frag_color = texture(normal_map, uv);
-	frag_color = texture(uv_map, uv);
+	vec4 albedo_color = texture(albedo_map, uv);
+	//frag_color = albedo_color * texture(light_map, uv);
+	//frag_color += (albedo_color * vec4(0.2, 0.2, 0.2, 1.0));
+	frag_color = albedo_color;
 }

assets/shaders/unshaded.frag

@@ -13,7 +13,7 @@ void main()
 
 	gbuffer[0] = diffuse_color * texture(diffuse_texture, uv);
 	gbuffer[1] = vec4(vertex.xyz, 1.0);
-	gbuffer[2] = vec4(normal.xyz, 1.0);
+	gbuffer[2] = vec4(normalize(normal.xyz), 1.0);
 	gbuffer[3] = vec4(uv, 0.0, 1.0);
 
 	// gbuffer[0] = (diffuse_color * texture(diffuse_texture, uv)).xyz;

src/components.h

@@ -6,6 +6,7 @@ enum Component
 	C_TRANSFORM = 0,
 	C_MODEL,
 	C_CAMERA,
+	C_LIGHT,
 	C_RIGIDBODY,
 	MAX_COMPONENTS
 };
@@ -18,6 +19,7 @@ inline static const char* comp_to_str(enum Component component)
 	case C_TRANSFORM :    str = "TRANSFORM";      break;
 	case C_MODEL :        str = "MODEL";          break;
 	case C_CAMERA :       str = "CAMERA";         break;
+	case C_LIGHT :        str = "LIGHT";          break;
 	case C_RIGIDBODY :    str = "RIGIDBODY";      break;
 	case MAX_COMPONENTS : str = "MAX_COMPONENTS"; break;
 	}

src/entity.c

@@ -4,6 +4,7 @@
 #include "string_utils.h"
 #include "transform.h"
 #include "camera.h"
+#include "light.h"
 #include "model.h"
 
 #include <stdlib.h>
@@ -126,6 +127,7 @@ int entity_component_remove(struct Entity* entity, enum Component component)
 	case C_TRANSFORM: log_error("entity:remove_component", "Cannot remove TRANSFORM"); break;
 	case C_MODEL:     if(comp_index != -1) model_remove(comp_index); break;
 	case C_CAMERA:    if(comp_index != -1) camera_remove(comp_index); break;
+	case C_LIGHT:     if(comp_index != -1) light_remove(comp_index); break;
 	case C_RIGIDBODY:
 		break;
 	default:
@@ -150,6 +152,7 @@ void* entity_component_get(struct Entity* entity, enum Component component)
 		case C_TRANSFORM: comp_obj = transform_get(comp_index); break;
 		case C_MODEL:     comp_obj = model_get(comp_index); break;
 		case C_CAMERA:    comp_obj = camera_get(comp_index); break;
+		case C_LIGHT:     comp_obj = light_get(comp_index); break;
 		case C_RIGIDBODY:
 			break;
 		default: log_error("entity:component_get", "Invalid component type"); break;
@@ -178,7 +181,8 @@ void* entity_component_add(struct Entity* entity, enum Component component, ...)
 	case C_MODEL:
 	{
 		const char* filename = va_arg(args, const char*);
-		new_comp_index = model_create(entity->node, filename);
+		const char* material_name = va_arg(args, const char*);
+		new_comp_index = model_create(entity->node, filename, material_name);
 		new_comp = model_get(new_comp_index);
 	}
 	break;
@@ -190,6 +194,13 @@ void* entity_component_add(struct Entity* entity, enum Component component, ...)
 		new_comp = camera_get(new_comp_index);
 	}
 	break;
+	case C_LIGHT:
+	{
+		int light_type = va_arg(args, int);
+		new_comp_index = light_create(entity->node, light_type);
+		new_comp = light_get(new_comp_index);
+	}
+	break;
 	case C_RIGIDBODY:
 		break;
 	default:

src/framebuffer.c

@@ -1,6 +1,5 @@
 #include "framebuffer.h"
 #include "array.h"
-#include "num_types.h"
 #include "renderer.h"
 #include "log.h"
 #include "texture.h"
@@ -161,3 +160,9 @@ int framebuffer_get_texture(int index)
 	assert(index < array_len(fbo_list) && index > -1);
 	return fbo_list[index].texture;
 }
+
+uint framebuffer_get_gl_handle(int index)
+{
+	assert(index < array_len(fbo_list) && index > -1);
+	return fbo_list[index].handle;
+}

src/framebuffer.h

@@ -1,6 +1,8 @@
 #ifndef framebuffer_H
 #define framebuffer_H
 
+#include "num_types.h"
+
 void framebuffer_init(void);
 void framebuffer_cleanup(void);
 int  framebuffer_create(int width, int height, int has_depth, int has_color);
@@ -11,5 +13,6 @@ int  framebuffer_get_width(int index);
 int  framebuffer_get_height(int index);
 void framebuffer_set_texture(int index, int texture, int attachment);
 int  framebuffer_get_texture(int index);
+uint framebuffer_get_gl_handle(int index);
 
 #endif

src/game.c

@@ -70,6 +70,7 @@ void scene_setup(void)
 	int turn_left_keys[1] = {'J'};
 	int turn_up_keys[1] = {'I'};
 	int turn_down_keys[1] = {'K'};
+	int sprint_keys[2] = {GLFW_KEY_LEFT_SHIFT, GLFW_KEY_RIGHT_SHIFT};
 	input_map_create("Move_Forward", forward_keys, 2);
 	input_map_create("Move_Backward", backward_keys, 2);
 	input_map_create("Move_Up", up_keys, 1);
@@ -80,12 +81,13 @@ void scene_setup(void)
 	input_map_create("Turn_Left", turn_left_keys, 1);
 	input_map_create("Turn_Up", turn_up_keys, 1);
 	input_map_create("Turn_Down", turn_down_keys, 1);
+	input_map_create("Sprint", sprint_keys, 2);
 	
 	struct Entity* player = scene_add_new("player", "None");
 	player_node = player->node;
-	vec3 viewer_pos = {0, 0, 10};
+	vec3 viewer_pos = {5, 4, 20};
 	struct Transform* viewer_tran = entity_component_get(player, C_TRANSFORM);
-	struct Model* player_model = entity_component_add(player, C_MODEL, "sphere.pamesh");
+	struct Model* player_model = entity_component_add(player, C_MODEL, "sphere.pamesh", NULL);
 	vec4 color = {0.f, 1.f, 1.f, 1.f };
 	model_set_material_param(player_model, "diffuse_color", &color);
 	vec4_fill(&color, 1.f, 1.f, 1.f, 1.f);
@@ -102,30 +104,30 @@ void scene_setup(void)
 	struct Transform* tran = entity_component_get(new_ent, C_TRANSFORM);
 	vec3 position = {0, 0, -5};
 	transform_translate(tran, &position, TS_WORLD);
-	struct Model* box_model = entity_component_add(new_ent, C_MODEL, "default.pamesh");
+	struct Model* box_model = entity_component_add(new_ent, C_MODEL, "default.pamesh", "Blinn_Phong");
 	model_set_material_param(box_model, "diffuse_color", &color);
 	struct Transform* model_tran = entity_component_get(new_ent, C_TRANSFORM);
 	vec3 scale = {1, 1, 2};
 	transform_scale(model_tran, &scale);
 
 	struct Entity* suz = scene_add_as_child("Suzanne", NULL, new_ent->node);
-	struct Model* suz_model = entity_component_add(suz, C_MODEL, "suzanne.pamesh");
+	struct Model* suz_model = entity_component_add(suz, C_MODEL, "suzanne.pamesh", "Blinn_Phong");
 	model_set_material_param(suz_model, "diffuse_color", &color);
 	struct Transform* s_tran = entity_component_get(suz, C_TRANSFORM);
 	vec3 s_pos = {3, 0, 0};
 	transform_translate(s_tran, &s_pos, TS_WORLD);
 
 	struct Entity* ground = scene_add_new("Ground", NULL);
-	struct Model* ground_model = entity_component_add(ground, C_MODEL, "plane.pamesh");
+	struct Model* ground_model = entity_component_add(ground, C_MODEL, "default.pamesh", "Blinn_Phong");
 	model_set_material_param(ground_model, "diffuse_color", &color);
 	struct Transform* ground_tran = entity_component_get(ground, C_TRANSFORM);
 	vec3 pos = {0, -3, -3};
-	vec3 scale_ground = {20.f, 10.f, 20.f};
+	vec3 scale_ground = {200.f, 0.2f, 200.f};
 	transform_set_position(ground_tran, &pos);
 	transform_scale(ground_tran, &scale_ground);
 
 	struct Entity* screen = scene_add_new("Screen", NULL);
-	struct Model* screen_model = entity_component_add(screen, C_MODEL, NULL);
+	struct Model* screen_model = entity_component_add(screen, C_MODEL, NULL, NULL);
 	screen_model->geometry_index = geom_find("Quad");
 	struct Entity* screen_camera = scene_add_as_child("Screen_Camera", NULL, screen->node);
 	struct Transform* screen_camera_tran = entity_component_get(screen_camera, C_TRANSFORM);
@@ -134,6 +136,20 @@ void scene_setup(void)
 	camera_attach_fbo(cam, 1024, 1024, 1, 1);
 	model_set_material_param(screen_model, "diffuse_color", &color);
 	model_set_material_param(screen_model, "diffuse_texture", &cam->render_tex);
+
+	const int MAX_LIGHTS = 10;
+	for(int i = 0; i < MAX_LIGHTS; i++)
+	{
+		int x = rand() % MAX_LIGHTS;
+		int z = rand() % MAX_LIGHTS;
+		x++; z++;
+		struct Entity* light_ent = scene_add_new("Light_Ent", NULL);
+		struct Transform* light_tran = entity_component_get(light_ent, C_TRANSFORM);
+		vec3 lt_pos = {x * 2, 3, z * 2};
+		transform_set_position(light_tran, &lt_pos);
+		struct Light* light_comp = entity_component_add(light_ent, C_LIGHT, LT_POINT);
+		vec4_fill(&light_comp->color, 1.f / (float)x, 1, 1.f / (float)z, 1);
+	}
 }
 
 void debug(float dt)
@@ -143,7 +159,7 @@ void debug(float dt)
 	struct Camera* cam = entity_component_get(entity, C_CAMERA);
 	camera_set_primary_viewer(cam);
 	struct Transform* transform = entity_component_get(entity, C_TRANSFORM);
-	float move_speed = 5.f, turn_speed = 50.f;
+	float move_speed = 5.f, move_scale = 3.f, turn_speed = 50.f;
 	vec3 offset = {0, 0, 0};
 	float turn_up_down = 0.f;
 	float turn_left_right = 0.f;
@@ -213,6 +229,7 @@ void debug(float dt)
 	}
 	
 	/* Movement */
+	if(input_map_state_get("Sprint", GLFW_PRESS)) move_speed *= move_scale;
 	if(input_map_state_get("Move_Forward", GLFW_PRESS)) offset.z -= move_speed;
 	if(input_map_state_get("Move_Backward", GLFW_PRESS)) offset.z += move_speed;
 	if(input_map_state_get("Move_Left", GLFW_PRESS)) offset.x -= move_speed;

src/light.c

@@ -4,6 +4,8 @@
 
 static struct Light* light_list;
 static int* empty_indices;
+static int* valid_light_indices;
+static int max_lights;
 
 struct Light* light_get(int index)
 {
@@ -20,8 +22,11 @@ struct Light* light_get_all(void)
 
 void light_init(void)
 {
-	light_list = array_new(struct Light);
-	empty_indices = array_new(int);
+	max_lights = 128;
+	light_list = array_new_cap(struct Light, max_lights);
+	for(int i = 0; i < max_lights; i++) light_list[i].valid = 0;
+	empty_indices = array_new_cap(int, max_lights);
+	valid_light_indices = array_new_cap(int, max_lights);
 }
 
 void light_cleanup(void)
@@ -30,6 +35,7 @@ void light_cleanup(void)
 		light_remove(i);
 	array_free(light_list);
 	array_free(empty_indices);
+	array_free(valid_light_indices);
 }
 
 void light_remove(int index)
@@ -63,10 +69,34 @@ int light_create(int node, int light_type)
 	new_light->depth_bias = 0.0005f;
 	new_light->type = light_type;
 	new_light->pcf_enabled = 0;
-	new_light->intensity = 1.f;
+	new_light->intensity = 0.5f;
 	new_light->falloff = 1.5f;
 	new_light->outer_angle = TO_RADIANS(30.f);
 	new_light->inner_angle = TO_RADIANS(20.f);
 	new_light->radius = 30;
 	return index;
 }
+
+int light_get_max_lights(void)
+{
+	return max_lights;
+}
+
+int* light_get_valid_indices(int* valid_light_count)
+{
+	/* First, get all the valid(active) lights, then sort them in the
+	   order directional, point, spot
+	 */
+	int light_count = 0;
+	for(int i = 0; i < array_len(light_list); i++)
+	{
+		if(light_list[i].valid)
+		{
+			valid_light_indices[light_count] = i;
+			light_count++;
+		}
+	}
+	*valid_light_count = light_count;
+	
+	return valid_light_indices;
+}

src/light.h

@@ -37,5 +37,7 @@ void light_cleanup(void);
 void light_remove(int index);
 int light_create(int node, int light_type);
 void light_set_radius(struct Light* light, int radius);
+int light_get_max_lights(void);
+int* light_get_valid_indices(int* valid_light_count);
 
 #endif

src/linmath.c

@@ -546,6 +546,141 @@ void mat4_assign(mat4* res, const mat4* m)
 	memcpy(res->mat, m->mat, sizeof(float) * 16);
 }
 
+
+void mat4_inverse(mat4* res, mat4* mat)
+{
+	mat4 tmp;
+	float det;
+	int i;
+
+	tmp.mat[0] = mat->mat[5]  * mat->mat[10] * mat->mat[15] -
+		mat->mat[5]  * mat->mat[11] * mat->mat[14] -
+		mat->mat[9]  * mat->mat[6]  * mat->mat[15] +
+		mat->mat[9]  * mat->mat[7]  * mat->mat[14] +
+		mat->mat[13] * mat->mat[6]  * mat->mat[11] -
+		mat->mat[13] * mat->mat[7]  * mat->mat[10];
+
+	tmp.mat[4] = -mat->mat[4]  * mat->mat[10] * mat->mat[15] +
+		mat->mat[4]  * mat->mat[11] * mat->mat[14] +
+		mat->mat[8]  * mat->mat[6]  * mat->mat[15] -
+		mat->mat[8]  * mat->mat[7]  * mat->mat[14] -
+		mat->mat[12] * mat->mat[6]  * mat->mat[11] +
+		mat->mat[12] * mat->mat[7]  * mat->mat[10];
+
+	tmp.mat[8] = mat->mat[4]  * mat->mat[9] * mat->mat[15] -
+		mat->mat[4]  * mat->mat[11] * mat->mat[13] -
+		mat->mat[8]  * mat->mat[5] * mat->mat[15] +
+		mat->mat[8]  * mat->mat[7] * mat->mat[13] +
+		mat->mat[12] * mat->mat[5] * mat->mat[11] -
+		mat->mat[12] * mat->mat[7] * mat->mat[9];
+
+	tmp.mat[12] = -mat->mat[4]  * mat->mat[9] * mat->mat[14] +
+		mat->mat[4]  * mat->mat[10] * mat->mat[13] +
+		mat->mat[8]  * mat->mat[5] * mat->mat[14] -
+		mat->mat[8]  * mat->mat[6] * mat->mat[13] -
+		mat->mat[12] * mat->mat[5] * mat->mat[10] +
+		mat->mat[12] * mat->mat[6] * mat->mat[9];
+
+	tmp.mat[1] = -mat->mat[1]  * mat->mat[10] * mat->mat[15] +
+		mat->mat[1]  * mat->mat[11] * mat->mat[14] +
+		mat->mat[9]  * mat->mat[2] * mat->mat[15] -
+		mat->mat[9]  * mat->mat[3] * mat->mat[14] -
+		mat->mat[13] * mat->mat[2] * mat->mat[11] +
+		mat->mat[13] * mat->mat[3] * mat->mat[10];
+
+	tmp.mat[5] = mat->mat[0]  * mat->mat[10] * mat->mat[15] -
+		mat->mat[0]  * mat->mat[11] * mat->mat[14] -
+		mat->mat[8]  * mat->mat[2] * mat->mat[15] +
+		mat->mat[8]  * mat->mat[3] * mat->mat[14] +
+		mat->mat[12] * mat->mat[2] * mat->mat[11] -
+		mat->mat[12] * mat->mat[3] * mat->mat[10];
+
+	tmp.mat[9] = -mat->mat[0]  * mat->mat[9] * mat->mat[15] +
+		mat->mat[0]  * mat->mat[11] * mat->mat[13] +
+		mat->mat[8]  * mat->mat[1] * mat->mat[15] -
+		mat->mat[8]  * mat->mat[3] * mat->mat[13] -
+		mat->mat[12] * mat->mat[1] * mat->mat[11] +
+		mat->mat[12] * mat->mat[3] * mat->mat[9];
+
+	tmp.mat[13] = mat->mat[0]  * mat->mat[9] * mat->mat[14] -
+		mat->mat[0]  * mat->mat[10] * mat->mat[13] -
+		mat->mat[8]  * mat->mat[1] * mat->mat[14] +
+		mat->mat[8]  * mat->mat[2] * mat->mat[13] +
+		mat->mat[12] * mat->mat[1] * mat->mat[10] -
+		mat->mat[12] * mat->mat[2] * mat->mat[9];
+
+	tmp.mat[2] = mat->mat[1]  * mat->mat[6] * mat->mat[15] -
+		mat->mat[1]  * mat->mat[7] * mat->mat[14] -
+		mat->mat[5]  * mat->mat[2] * mat->mat[15] +
+		mat->mat[5]  * mat->mat[3] * mat->mat[14] +
+		mat->mat[13] * mat->mat[2] * mat->mat[7] -
+		mat->mat[13] * mat->mat[3] * mat->mat[6];
+
+	tmp.mat[6] = -mat->mat[0]  * mat->mat[6] * mat->mat[15] +
+		mat->mat[0]  * mat->mat[7] * mat->mat[14] +
+		mat->mat[4]  * mat->mat[2] * mat->mat[15] -
+		mat->mat[4]  * mat->mat[3] * mat->mat[14] -
+		mat->mat[12] * mat->mat[2] * mat->mat[7] +
+		mat->mat[12] * mat->mat[3] * mat->mat[6];
+
+	tmp.mat[10] = mat->mat[0]  * mat->mat[5] * mat->mat[15] -
+		mat->mat[0]  * mat->mat[7] * mat->mat[13] -
+		mat->mat[4]  * mat->mat[1] * mat->mat[15] +
+		mat->mat[4]  * mat->mat[3] * mat->mat[13] +
+		mat->mat[12] * mat->mat[1] * mat->mat[7] -
+		mat->mat[12] * mat->mat[3] * mat->mat[5];
+
+	tmp.mat[14] = -mat->mat[0]  * mat->mat[5] * mat->mat[14] +
+		mat->mat[0]  * mat->mat[6] * mat->mat[13] +
+		mat->mat[4]  * mat->mat[1] * mat->mat[14] -
+		mat->mat[4]  * mat->mat[2] * mat->mat[13] -
+		mat->mat[12] * mat->mat[1] * mat->mat[6] +
+		mat->mat[12] * mat->mat[2] * mat->mat[5];
+
+	tmp.mat[3] = -mat->mat[1] * mat->mat[6] * mat->mat[11] +
+		mat->mat[1] * mat->mat[7] * mat->mat[10] +
+		mat->mat[5] * mat->mat[2] * mat->mat[11] -
+		mat->mat[5] * mat->mat[3] * mat->mat[10] -
+		mat->mat[9] * mat->mat[2] * mat->mat[7] +
+		mat->mat[9] * mat->mat[3] * mat->mat[6];
+
+	tmp.mat[7] = mat->mat[0] * mat->mat[6] * mat->mat[11] -
+		mat->mat[0] * mat->mat[7] * mat->mat[10] -
+		mat->mat[4] * mat->mat[2] * mat->mat[11] +
+		mat->mat[4] * mat->mat[3] * mat->mat[10] +
+		mat->mat[8] * mat->mat[2] * mat->mat[7] -
+		mat->mat[8] * mat->mat[3] * mat->mat[6];
+
+	tmp.mat[11] = -mat->mat[0] * mat->mat[5] * mat->mat[11] +
+		mat->mat[0] * mat->mat[7] * mat->mat[9] +
+		mat->mat[4] * mat->mat[1] * mat->mat[11] -
+		mat->mat[4] * mat->mat[3] * mat->mat[9] -
+		mat->mat[8] * mat->mat[1] * mat->mat[7] +
+		mat->mat[8] * mat->mat[3] * mat->mat[5];
+
+	tmp.mat[15] = mat->mat[0] * mat->mat[5] * mat->mat[10] -
+		mat->mat[0] * mat->mat[6] * mat->mat[9] -
+		mat->mat[4] * mat->mat[1] * mat->mat[10] +
+		mat->mat[4] * mat->mat[2] * mat->mat[9] +
+		mat->mat[8] * mat->mat[1] * mat->mat[6] -
+		mat->mat[8] * mat->mat[2] * mat->mat[5];
+
+	det = mat->mat[0] * tmp.mat[0] + mat->mat[1] * tmp.mat[4] + mat->mat[2] * tmp.mat[8] + mat->mat[3] * tmp.mat[12];
+
+	if (det == 0) {
+		return;
+	}
+
+	det = 1.0 / det;
+
+	for (i = 0; i < 16; i++) {
+		res->mat[i] = tmp.mat[i] * det;
+	}
+}
+
+
+
+
 void quat_fill(quat* res, float x, float y, float z, float w)
 {
 	res->x = x;

src/linmath.h

@@ -110,6 +110,7 @@ void mat4_lookat(mat4* res, const vec3* eye, const vec3* center, const vec3* up_
 void mat4_translate(mat4* res, float x, float y, float z);
 void mat4_mul(mat4* res, const mat4* mat1, const mat4* mat2);
 void mat4_identity(mat4* res);
+void mat4_inverse(mat4* res, mat4* mat);
 
 /* quat */
 float quat_get_roll(const quat* q);

src/material.c

@@ -5,6 +5,7 @@
 #include "log.h"
 #include "model.h"
 #include "texture.h"
+#include "light.h"
 
 #include <string.h>
 #include <stdlib.h>
@@ -27,6 +28,7 @@ void material_init(void)
 	unshaded_mat->model_params = array_new(struct Uniform);
 	unshaded_mat->pipeline_params = array_new(struct Uniform);
 	unshaded_mat->active = 1;
+	unshaded_mat->lit = 0;
 
 	/* Pipeline params/uniforms */
 	struct Uniform* uniform = array_grow(unshaded_mat->pipeline_params, struct Uniform);
@@ -44,16 +46,75 @@ void material_init(void)
 	uniform->type = UT_MAT4;
 	uniform->location = shader_get_uniform_location(unshaded_mat->shader, uniform->name);
 
-	/* Materail params */
+	/* Material params */
 	uniform = array_grow(unshaded_mat->model_params, struct Uniform);
 	uniform->name = str_new("diffuse_color");
 	uniform->type = UT_VEC4;
+	vec4_fill(&uniform->d_vec4, 1.0f, 1.0f, 1.0f, 1.0f);
 	uniform->location = shader_get_uniform_location(unshaded_mat->shader, uniform->name);
 
 	uniform = array_grow(unshaded_mat->model_params, struct Uniform);
 	uniform->name = str_new("diffuse_texture");
 	uniform->type = UT_TEX;
+	uniform->d_int = texture_find("default.tga");
 	uniform->location = shader_get_uniform_location(unshaded_mat->shader, uniform->name);
+
+	/* Simple blinn_phong material */
+	struct Material* blinn_phong_mat = array_grow(material_list, struct Material);
+	blinn_phong_mat->name = str_new("Blinn_Phong");
+	blinn_phong_mat->shader = shader_create("blinn_phong.vert", "blinn_phong.frag");
+	blinn_phong_mat->registered_models = array_new(int);
+	blinn_phong_mat->model_params = array_new(struct Uniform);
+	blinn_phong_mat->pipeline_params = array_new(struct Uniform);
+	blinn_phong_mat->active = 1;
+	blinn_phong_mat->lit = 1;
+
+	/* Pipeline params/uniforms */
+	uniform = array_grow(blinn_phong_mat->pipeline_params, struct Uniform);
+	uniform->name = str_new("mvp");
+	uniform->type = UT_MAT4;
+	uniform->location = shader_get_uniform_location(blinn_phong_mat->shader, uniform->name);
+
+	uniform = array_grow(blinn_phong_mat->pipeline_params, struct Uniform);
+	uniform->name = str_new("model_mat");
+	uniform->type = UT_MAT4;
+	uniform->location = shader_get_uniform_location(blinn_phong_mat->shader, uniform->name);
+
+	uniform = array_grow(blinn_phong_mat->pipeline_params, struct Uniform);
+	uniform->name = str_new("view_mat");
+	uniform->type = UT_MAT4;
+	uniform->location = shader_get_uniform_location(blinn_phong_mat->shader, uniform->name);
+
+	/* Material params */
+	uniform = array_grow(blinn_phong_mat->model_params, struct Uniform);
+	uniform->name = str_new("diffuse_color");
+	uniform->type = UT_VEC4;
+	vec4_fill(&uniform->d_vec4, 1.0f, 1.0f, 1.0f, 1.0f);
+	uniform->location = shader_get_uniform_location(blinn_phong_mat->shader, uniform->name);
+
+	uniform = array_grow(blinn_phong_mat->model_params, struct Uniform);
+	uniform->name = str_new("diffuse_texture");
+	uniform->type = UT_TEX;
+	uniform->d_int = texture_find("default.tga");
+	uniform->location = shader_get_uniform_location(blinn_phong_mat->shader, uniform->name);
+
+	uniform = array_grow(blinn_phong_mat->model_params, struct Uniform);
+	uniform->name = str_new("specular");
+	uniform->type = UT_FLOAT;
+	uniform->d_float = 1.f;
+	uniform->location = shader_get_uniform_location(blinn_phong_mat->shader, uniform->name);
+
+	uniform = array_grow(blinn_phong_mat->model_params, struct Uniform);
+	uniform->name = str_new("diffuse");
+	uniform->type = UT_FLOAT;
+	uniform->d_float = 1.f;
+	uniform->location = shader_get_uniform_location(blinn_phong_mat->shader, uniform->name);
+
+	uniform = array_grow(blinn_phong_mat->model_params, struct Uniform);
+	uniform->name = str_new("specular_strength");
+	uniform->type = UT_FLOAT;
+	uniform->d_float = 50.f;
+	uniform->location = shader_get_uniform_location(blinn_phong_mat->shader, uniform->name);
 }
 
 struct Material* material_get_all_materials(void)
@@ -92,23 +153,23 @@ int material_register_model(struct Model* model, int model_index, const char* ma
 		{
 		case UT_INT:
 			param->value = malloc(sizeof(int));
-			*((int*)param->value) = -1;
+			*((int*)param->value) = uniform->d_int;
 			break;
 		case UT_FLOAT:
 			param->value = malloc(sizeof(float));
-			*((float*)param->value) = -1.f;
+			*((float*)param->value) = uniform->d_float;
 			break;
 		case UT_VEC2:
 			param->value = malloc(sizeof(vec2));
-			vec2_fill((vec2*)param->value, 0.f, 0.f);
+			vec2_assign((vec2*)param->value, &uniform->d_vec2);
 			break;
 		case UT_VEC3:
 			param->value = malloc(sizeof(vec3));
-			vec3_fill((vec3*)param->value, 0.f, 0.f, 0.f);
+			vec3_assign((vec3*)param->value, &uniform->d_vec3);
 			break;
 		case UT_VEC4:
 			param->value = malloc(sizeof(vec4));
-			vec4_fill((vec4*)param->value, 0.f, 0.f, 0.f, 0.f);
+			vec4_assign((vec4*)param->value, &uniform->d_vec4);
 			break;
 		case UT_MAT4:
 			param->value = malloc(sizeof(mat4));

src/material.h

@@ -1,13 +1,23 @@
 #ifndef material_H
 #define material_H
 
+#include "linmath.h"
+
 struct Model;
 
 struct Uniform
 {
 	int   location;
-	int   type;
 	char* name;
+	int   type;
+	union /* Default values */
+	{
+		vec2  d_vec2;
+		vec3  d_vec3;
+		vec4  d_vec4;
+		int   d_int;
+		float d_float;
+	};
 };
 
 struct Material_Param
@@ -22,6 +32,7 @@ struct Material
 	int   shader;
 	int*  registered_models;
 	int   active;
+	int   lit;					  /* If material uses light information */
 	struct Uniform* model_params; /* uniforms related to models */
 	struct Uniform* pipeline_params; /* general uniforms like matrices etc */
 };

src/model.c

@@ -9,6 +9,7 @@
 #include "texture.h"
 #include "renderer.h"
 #include "material.h"
+#include "light.h"
 
 #include "GL/glew.h"
 #include "GLFW/glfw3.h"
@@ -16,6 +17,7 @@
 #include <assert.h>
 #include <string.h>
 #include <stdlib.h>
+#include <stdio.h>
 
 static struct Model* model_list;
 static int* empty_indices;
@@ -35,7 +37,7 @@ void model_init(void)
 	empty_indices = array_new(int);
 }
 
-int model_create(int node, const char* geo_name)
+int model_create(int node, const char* geo_name, const char* material_name)
 {
 	/* if no name is given for geometry, use default */
 	if(!geo_name) geo_name = "default.pamesh";
@@ -57,7 +59,7 @@ int model_create(int node, const char* geo_name)
 		}
 		new_model->node = node;
 		new_model->geometry_index = geo_index;
-		if(!material_register_model(new_model, index, "Unshaded"))
+		if(!material_register_model(new_model, index, material_name ? material_name : "Unshaded"))
 		{
 			log_error("model:create", "Unable to register model with Unshaded material, component not added");
 			model_remove(index);
@@ -156,8 +158,66 @@ void model_render_all(struct Camera* camera)
 					renderer_check_glerror("model:render_all:material_pipeline");
 				}
 			}
+
+			if(material->lit)	/* Set light information */
+			{
+				int valid_light_count = 0;
+				int* light_index_list = light_get_valid_indices(&valid_light_count);
+				const int max_name_len = 64;
+				char uniform_name[max_name_len];
+				memset(uniform_name, '\0', max_name_len);
+				for(int i = 0; i < valid_light_count; i++)
+				{
+					struct Light* light = light_get(light_index_list[i]); /* TODO: Cull lights according to camera frustum */
+					struct Entity* light_entity = entity_get(light->node);
+					struct Transform* transform = entity_component_get(light_entity, C_TRANSFORM);
+					vec3 light_pos = {0, 0, 0};
+					transform_get_absolute_pos(transform, &light_pos);
+					
+					snprintf(uniform_name, max_name_len, "lights[%d].position", i);
+					shader_set_uniform_vec3(material->shader,  uniform_name, &light_pos);
+					memset(uniform_name, '\0', max_name_len);
+					
+					snprintf(uniform_name, max_name_len, "lights[%d].color", i);
+					shader_set_uniform_vec4(material->shader,  uniform_name, &light->color);
+					memset(uniform_name, '\0', max_name_len);
+					
+					snprintf(uniform_name, max_name_len, "lights[%d].outer_angle", i);
+					shader_set_uniform_float(material->shader, uniform_name, light->outer_angle);
+					memset(uniform_name, '\0', max_name_len);
+					
+					snprintf(uniform_name, max_name_len, "lights[%d].inner_angle", i);
+					shader_set_uniform_float(material->shader, uniform_name, light->inner_angle);
+					memset(uniform_name, '\0', max_name_len);
+					
+					snprintf(uniform_name, max_name_len, "lights[%d].falloff", i);
+					shader_set_uniform_float(material->shader, uniform_name, light->falloff);
+					memset(uniform_name, '\0', max_name_len);
+					
+					snprintf(uniform_name, max_name_len, "lights[%d].intensity", i);
+					shader_set_uniform_float(material->shader, uniform_name, light->intensity);
+					memset(uniform_name, '\0', max_name_len);
+					
+					snprintf(uniform_name, max_name_len, "lights[%d].type", i);
+					shader_set_uniform_int(material->shader, uniform_name, light->type);
+					memset(uniform_name, '\0', max_name_len);
+					
+					snprintf(uniform_name, max_name_len, "lights[%d].radius", i);
+					shader_set_uniform_int(material->shader, uniform_name, light->radius);
+					memset(uniform_name, '\0', max_name_len);
+				}
+
+				shader_set_uniform_int(material->shader, "total_active_lights", valid_light_count);
+				struct Entity* camera_entity = entity_get(camera->node);
+				struct Transform* camera_tran = entity_component_get(camera_entity, C_TRANSFORM);
+				vec3 camera_pos = {0, 0, 0};
+				transform_get_absolute_pos(camera_tran, &camera_pos);
+				shader_set_uniform_vec3(material->shader, "camera_pos", &camera_pos);
+			}
+			
 			/* Render the geometry */
-			geom_render_in_frustum(model->geometry_index, &camera->frustum[0], transform);
+			//geom_render_in_frustum(model->geometry_index, &camera->frustum[0], transform);
+			geom_render(model->geometry_index);
 
 			for(int k = 0; k < array_len(model->material_params); k++)
 			{

src/model.h

@@ -16,7 +16,7 @@ struct Model
 
 struct Model* model_get(int index);
 void model_init(void);
-int  model_create(int node, const char* geo_name);
+int  model_create(int node, const char* geo_name, const char* material_name);
 void model_remove(int index);
 void model_cleanup(void);
 void model_render_all(struct Camera* camera);

src/renderer.c

@@ -12,8 +12,13 @@
 #include "shader.h"
 #include "num_types.h"
 #include "window_system.h"
+#include "light.h"
+#include "entity.h"
+#include "transform.h"
 
 static int def_fbo = -1;
+static int light_fbo = -1;
+static int light_tex = -1;
 static int def_albedo_tex = -1;
 static int def_position_tex = -1;
 static int def_normal_tex = -1;
@@ -21,6 +26,7 @@ static int def_uv_tex = -1;
 static int def_depth_tex = -1;
 static int quad_geo = -1;
 static int fbo_shader = -1;
+static int composition_shader = -1;
 
 void on_framebuffer_size_change(GLFWwindow* window, int width, int height);
 
@@ -115,7 +121,7 @@ void renderer_init(GLFWwindow* window)
 	texture_set_param(def_uv_tex, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
 	def_depth_tex = texture_create("def_depth_texture",
-									TU_DIFFUSE,
+									TU_SHADOWMAP4,
 									width, height,
 									GL_DEPTH_COMPONENT,
 									GL_DEPTH_COMPONENT32F,
@@ -130,12 +136,28 @@ void renderer_init(GLFWwindow* window)
 
 	def_fbo = framebuffer_create(width, height, 1, 1);
 	framebuffer_set_texture(def_fbo, def_albedo_tex, GL_COLOR_ATTACHMENT0);
-	framebuffer_set_texture(def_fbo, def_position_tex, GL_COLOR_ATTACHMENT0 + 1);
-	framebuffer_set_texture(def_fbo, def_normal_tex, GL_COLOR_ATTACHMENT0 + 2);
-	framebuffer_set_texture(def_fbo, def_uv_tex, GL_COLOR_ATTACHMENT0 + 3);
+	/* framebuffer_set_texture(def_fbo, def_position_tex, GL_COLOR_ATTACHMENT0 + 1); */
+	/* framebuffer_set_texture(def_fbo, def_normal_tex, GL_COLOR_ATTACHMENT0 + 2); */
+	/* framebuffer_set_texture(def_fbo, def_uv_tex, GL_COLOR_ATTACHMENT0 + 3); */
 	framebuffer_set_texture(def_fbo, def_depth_tex, GL_DEPTH_ATTACHMENT);
-		
-	fbo_shader = shader_create("fbo.vert", "fbo.frag");
+
+
+	light_tex = texture_create("light_tex",
+							   TU_SHADOWMAP1,
+							   width, height,
+							   GL_RGB,
+							   GL_RGB16F,
+							   GL_FLOAT,
+							   NULL);
+	texture_set_param(light_tex, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	texture_set_param(light_tex, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	texture_set_param(light_tex, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	texture_set_param(light_tex, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	light_fbo = framebuffer_create(width, height, 0, 1);
+	framebuffer_set_texture(light_fbo, light_tex, GL_COLOR_ATTACHMENT0);
+	
+	composition_shader = shader_create("fbo.vert", "fbo.frag");
+	//fbo_shader = shader_create("deferred_light.vert", "deferred_light.frag");
 }
 
 void renderer_draw(void)
@@ -151,23 +173,22 @@ void renderer_draw(void)
 		framebuffer_bind(fbo);
 		{
 			glViewport(0, 0, framebuffer_get_width(fbo), framebuffer_get_height(fbo));
-			GLenum draw_buffers[] = {GL_COLOR_ATTACHMENT0,
-									 GL_COLOR_ATTACHMENT1,
-									 GL_COLOR_ATTACHMENT2,
-									 GL_COLOR_ATTACHMENT3};
-			glDrawBuffers(4, &draw_buffers[0]);
-			//glDrawBuffer(GL_COLOR_ATTACHMENT0);
+			/* GLenum draw_buffers[] = {GL_COLOR_ATTACHMENT0, */
+			/* 						 GL_COLOR_ATTACHMENT1, */
+			/* 						 GL_COLOR_ATTACHMENT2, */
+			/* 						 GL_COLOR_ATTACHMENT3}; */
+			/* glDrawBuffers(4, &draw_buffers[0]); */
+			glDrawBuffer(GL_COLOR_ATTACHMENT0);
 			glEnable(GL_DEPTH_TEST);
 			glDepthFunc(GL_LEQUAL);
-			glEnable(GL_BLEND);
-			glBlendEquation(GL_FUNC_ADD);
 			glClearColor(camera->clear_color.x,
 						 camera->clear_color.y,
 						 camera->clear_color.z,
 						 camera->clear_color.w);
+			glEnable(GL_CULL_FACE );
+			glCullFace(GL_BACK);
 			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 			model_render_all(camera);
-			glDisable(GL_BLEND);
 		}
 		framebuffer_unbind();
 	}
@@ -176,52 +197,148 @@ void renderer_draw(void)
 	window_get_size(&width, &height);
 	glViewport(0, 0, width, height);
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-	glEnable(GL_BLEND);
-	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-	shader_bind(fbo_shader);
+	shader_bind(composition_shader);
 
-	shader_set_uniform_int(fbo_shader, "albedo_map", (GL_TEXTURE0 + TU_DIFFUSE) - GL_TEXTURE0);
+	//shader_set_uniform_int(composition_shader, "albedo_map", (GL_TEXTURE0 + TU_DIFFUSE) - GL_TEXTURE0);
 	texture_bind(def_albedo_tex);
+	
+	geom_render(quad_geo);
+	
+	shader_unbind();
+	
+	texture_unbind(def_albedo_tex);
+	
+	/* int width, height; */
+	/* window_get_size(&width, &height); */
+	/* struct Camera* active_camera = camera_get_primary(); */
+	/* struct Entity* camera_entity = entity_get(active_camera->node); */
+	/* struct Transform* camera_tran = entity_component_get(camera_entity, C_TRANSFORM); */
+
+	/* framebuffer_bind(light_fbo); */
+	/* { */
+	/* 	glViewport(0, 0, width, height); */
+	/* 	glClearColor(0.f, 0.f, 0.f, 1.0f); */
+	/* 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); */
+	/* 	//glEnable(GL_BLEND); */
+	/* 	//glEnable(GL_DEPTH_TEST ); */
+	/* 	/\* glDisable(GL_DEPTH_TEST ); *\/ */
+	/* 	/\* glEnable(GL_CULL_FACE ); *\/ */
+	/* 	/\* glCullFace(GL_BACK); *\/ */
+	/* 	/\* glDepthFunc(GL_LEQUAL); *\/ */
+	/* 	/\* glBlendEquation(GL_FUNC_ADD); *\/ */
+	/* 	/\* glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); *\/ */
+
+	/* 	/\* uint gbuffer_fbo_handle = 0; *\/ */
+	/* 	/\* gbuffer_fbo_handle = framebuffer_get_gl_handle(def_fbo); *\/ */
+	/* 	/\* glBindFramebuffer(GL_READ_FRAMEBUFFER, gbuffer_fbo_handle); *\/ */
+	/* 	/\* glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); *\/ */
+	/* 	/\* glBlitFramebuffer(0, 0, width, height, 0, 0, width, height, GL_DEPTH_BUFFER_BIT, GL_NEAREST); *\/ */
+	/* 	/\* glBindFramebuffer(GL_FRAMEBUFFER, 0); *\/ */
+
+
+	/* 	shader_bind(fbo_shader); */
 
-	shader_set_uniform_int(fbo_shader, "position_map", (GL_TEXTURE0 + TU_SHADOWMAP1) - GL_TEXTURE0);
-	texture_bind(def_position_tex);
+	/* 	vec3 camera_pos = {0, 0, 0}; */
+	/* 	transform_get_absolute_pos(camera_tran, &camera_pos); */
+	/* 	shader_set_uniform_vec3(fbo_shader, "camera_pos", &camera_pos); */
+
+	/* 	shader_set_uniform_int(fbo_shader, "albedo_map", (GL_TEXTURE0 + TU_DIFFUSE) - GL_TEXTURE0); */
+	/* 	texture_bind(def_albedo_tex); */
+
+	/* 	shader_set_uniform_int(fbo_shader, "position_map", (GL_TEXTURE0 + TU_SHADOWMAP1) - GL_TEXTURE0); */
+	/* 	texture_bind(def_position_tex); */
 	
-	shader_set_uniform_int(fbo_shader, "normal_map", (GL_TEXTURE0 + TU_SHADOWMAP2) - GL_TEXTURE0);
-	texture_bind(def_normal_tex);
+	/* 	shader_set_uniform_int(fbo_shader, "normal_map", (GL_TEXTURE0 + TU_SHADOWMAP2) - GL_TEXTURE0); */
+	/* 	texture_bind(def_normal_tex); */
 
-	shader_set_uniform_int(fbo_shader, "uv_map", (GL_TEXTURE0 + TU_SHADOWMAP3) - GL_TEXTURE0);
-	texture_bind(def_uv_tex);
+	/* 	/\* shader_set_uniform_int(fbo_shader, "depth_map", (GL_TEXTURE0 + TU_SHADOWMAP4) - GL_TEXTURE0); *\/ */
+	/* 	/\* texture_bind(def_depth_tex); *\/ */
+
+	/* 	/\* shader_set_uniform_int(fbo_shader, "uv_map", (GL_TEXTURE0 + TU_SHADOWMAP3) - GL_TEXTURE0); *\/ */
+	/* 	/\* texture_bind(def_uv_tex); *\/ */
+
+	/* 	struct Light* active_lights = light_get_all(); */
+	/* 	int sphere_geo = geom_find("sphere.pamesh"); */
+	/* 	mat4 mvp; */
+	/* 	struct Transform sphere_tran; */
+
+	/* 	vec2 screen_size = {width, height}; */
+	/* 	shader_set_uniform_vec2(fbo_shader, "screen_size", &screen_size); */
+	
+	/* 	for(int i = 0; i < array_len(active_lights); i++) */
+	/* 	{	 */
+	/* 		if(i == 0) */
+	/* 			glBlendFunc(GL_ZERO, GL_ONE); */
+	/* 		else */
+	/* 			glBlendFunc(GL_ONE, GL_ONE); */
+		
+	/* 		/\* Set light uniform *\/ */
+	/* 		struct Light* light = light_get(i); /\* TODO: Remove this and do it properly *\/ */
+	/* 		struct Entity* light_entity = entity_get(light->node); */
+	/* 		struct Transform* transform = entity_component_get(light_entity, C_TRANSFORM); */
+	/* 		vec3 light_pos = {0, 0, 0}; */
+	/* 		transform_get_absolute_pos(transform, &light_pos); */
+	/* 		shader_set_uniform_vec3(fbo_shader, "light.position", &light_pos); */
+	/* 		shader_set_uniform_vec4(fbo_shader, "light.color", &light->color); */
+	/* 		shader_set_uniform_float(fbo_shader, "light.outer_angle", light->outer_angle); */
+	/* 		shader_set_uniform_float(fbo_shader, "light.inner_angle", light->inner_angle); */
+	/* 		shader_set_uniform_float(fbo_shader, "light.falloff", light->falloff); */
+	/* 		shader_set_uniform_float(fbo_shader, "light.intensity", light->intensity); */
+	/* 		shader_set_uniform_int(fbo_shader, "light.type", light->type); */
+	/* 		shader_set_uniform_int(fbo_shader, "light.radius", light->radius); */
+
+	/* 		/\* vec2 planes = {active_camera->nearz, active_camera->farz}; *\/ */
+	/* 		/\* //vec2 planes = {active_camera->farz, active_camera->nearz}; *\/ */
+	/* 		/\* shader_set_uniform_vec2(fbo_shader, "planes", &planes); *\/ */
+			
+	/* 		mat4_identity(&mvp); */
+	/* 		transform_set_position(&sphere_tran, &light_pos); */
+	/* 		vec3 light_scale = {light->radius, light->radius, light->radius}; */
+	/* 		transform_scale(&sphere_tran, &light_scale); */
+	/* 		mat4_mul(&mvp, &active_camera->view_proj_mat, &sphere_tran.trans_mat); */
+	/* 		shader_set_uniform_mat4(fbo_shader, "mvp", &mvp); */
+	/* 		/\* mat4 inv_proj_mat; *\/ */
+	/* 		/\* mat4_identity(&inv_proj_mat); *\/ */
+	/* 		/\* mat4_inverse(&inv_proj_mat, &active_camera->view_proj_mat); *\/ */
+	/* 		/\* shader_set_uniform_mat4(fbo_shader, "inv_proj_mat", &inv_proj_mat); *\/ */
+	/* 		geom_render(quad_geo); */
+	/* 		//geom_render(sphere_geo); */
+	/* 	} */
 
-	geom_render(quad_geo);
 	
-	//struct Camera* primary_camera = camera_get_primary();
-	//texture_bind(primary_camera->render_tex);
-	/* glViewport(0, height / 2, width / 2, height / 2); */
-	/* texture_bind(def_albedo_tex); */
-	/* geom_render(quad_geo); */
-	/* texture_unbind(def_albedo_tex); */
-
-	/* glViewport(width / 2, height / 2, width / 2, height / 2); */
-	/* texture_bind(def_position_tex); */
-	/* geom_render(quad_geo); */
-	/* texture_unbind(def_position_tex); */
-
-	/* glViewport(0, 0, width / 2, height / 2); */
-	/* texture_bind(def_normal_tex); */
-	/* geom_render(quad_geo); */
-	/* texture_unbind(def_normal_tex); */
-
-	/* glViewport(width / 2, 0, width / 2, height / 2); */
-	/* texture_bind(def_depth_tex); */
-	/* geom_render(quad_geo); */
-	/* texture_unbind(def_depth_tex); */
+	/* 	//struct Camera* primary_camera = camera_get_primary(); */
+	/* 	//texture_bind(primary_camera->render_tex); */
+	/* 	/\* glViewport(0, height / 2, width / 2, height / 2); *\/ */
+	/* 	/\* texture_bind(def_albedo_tex); *\/ */
+	/* 	/\* geom_render(quad_geo); *\/ */
+	/* 	/\* texture_unbind(def_albedo_tex); *\/ */
+
+	/* 	/\* glViewport(width / 2, height / 2, width / 2, height / 2); *\/ */
+	/* 	/\* texture_bind(def_position_tex); *\/ */
+	/* 	/\* geom_render(quad_geo); *\/ */
+	/* 	/\* texture_unbind(def_position_tex); *\/ */
+
+	/* 	/\* glViewport(0, 0, width / 2, height / 2); *\/ */
+	/* 	/\* texture_bind(def_normal_tex); *\/ */
+	/* 	/\* geom_render(quad_geo); *\/ */
+	/* 	/\* texture_unbind(def_normal_tex); *\/ */
+
+	/* 	/\* glViewport(width / 2, 0, width / 2, height / 2); *\/ */
+	/* 	/\* texture_bind(def_depth_tex); *\/ */
+	/* 	/\* geom_render(quad_geo); *\/ */
+	/* 	/\* texture_unbind(def_depth_tex); *\/ */
 	
-	shader_unbind();
+	/* 	shader_unbind(); */
 
-	texture_unbind(def_albedo_tex);
-	texture_unbind(def_position_tex);
-	texture_unbind(def_normal_tex);
-	texture_unbind(def_uv_tex);
+	
+	
+	/* 	texture_unbind(def_albedo_tex); */
+	/* 	texture_unbind(def_position_tex); */
+	/* 	texture_unbind(def_normal_tex); */
+	/* 	texture_unbind(def_uv_tex); */
+	/* 	glDisable(GL_BLEND); */
+	/* } */
+	/* framebuffer_unbind(); */
 }
 
 void renderer_cleanup(void)

src/transform.c

@@ -156,25 +156,28 @@ void transform_update_transmat(struct Transform* transform)
 	mat4_mul(&transform->trans_mat, &transform->trans_mat, &scale);
 	
 	struct Entity* entity = entity_get(transform->node);
-	struct Entity* parent = entity_get(entity->parent);
-	if(parent)
+	if(entity)	 /* Only update if transform is attached to an entity */
 	{
-		struct Transform* parent_tran = entity_component_get(parent, C_TRANSFORM);
-		mat4_mul(&transform->trans_mat, &transform->trans_mat, &parent_tran->trans_mat);
-	}
+		struct Entity* parent = entity_get(entity->parent);
+		if(parent)
+		{
+			struct Transform* parent_tran = entity_component_get(parent, C_TRANSFORM);
+			mat4_mul(&transform->trans_mat, &transform->trans_mat, &parent_tran->trans_mat);
+		}
 
-	/* Update all children */
-	if(array_len(entity->children) > 0)
-	{
-		for(int i = 0; i < array_len(entity->children); i++)
+		/* Update all children */
+		if(array_len(entity->children) > 0)
 		{
-			struct Entity* child = entity_get(entity->children[i]);
-			struct Transform* child_tran = entity_component_get(child, C_TRANSFORM);
-			transform_update_transmat(child_tran);
+			for(int i = 0; i < array_len(entity->children); i++)
+			{
+				struct Entity* child = entity_get(entity->children[i]);
+				struct Transform* child_tran = entity_component_get(child, C_TRANSFORM);
+				transform_update_transmat(child_tran);
+			}
 		}
-	}
 	
-	entity_sync_components(entity);
+		entity_sync_components(entity);
+	}
 }
 
 struct Transform* transform_get(int index)