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A 3d fps game made in OpenGL
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Symmetry/src/libsymmetry/renderer.c

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#include "renderer.h"
#include "gl_load.h"
#include "../common/log.h"
#include "camera.h"
#include "model.h"
#include "texture.h"
#include "framebuffer.h"
#include "../common/array.h"
#include "shader.h"
#include "../common/num_types.h"
#include "light.h"
#include "entity.h"
#include "transform.h"
#include "game.h"
#include "gui.h"
#include "../common/hashmap.h"
#include "geometry.h"
#include "material.h"
#include "editor.h"
#include "sprite.h"
#include "im_render.h"
#include "../common/variant.h"
#include "../common/common.h"
#include "scene.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
void on_framebuffer_size_change(int width, int height);
void renderer_init(struct Renderer* renderer)
{
assert(renderer);
glClearColor(0.3f, 0.6f, 0.9f, 1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
platform->windowresize_callback_set(on_framebuffer_size_change);
gui_init();
struct Hashmap* cvars = platform->config.get();
renderer->settings.fog.mode = hashmap_int_get(cvars, "fog_mode");
renderer->settings.fog.density = hashmap_float_get(cvars, "fog_density");
renderer->settings.fog.start_dist = hashmap_float_get(cvars, "fog_start_dist");
renderer->settings.fog.max_dist = hashmap_float_get(cvars, "fog_max_dist");
renderer->settings.fog.color = hashmap_vec3_get(cvars, "fog_color");
renderer->settings.debug_draw_enabled = hashmap_bool_get(cvars, "debug_draw_enabled");
renderer->settings.debug_draw_physics = hashmap_bool_get(cvars, "debug_draw_physics");
renderer->settings.debug_draw_mode = hashmap_int_get(cvars, "debug_draw_mode");
renderer->settings.debug_draw_color = hashmap_vec4_get(cvars, "debug_draw_color");
renderer->settings.ambient_light = hashmap_vec3_get(cvars, "ambient_light");
/* Quad geometry for final render */
vec3* vertices = array_new(vec3);
vec2* uvs = array_new(vec2);
vec3* normals = array_new(vec3);
uint* indices = array_new(uint);
vec3 temp_v3;
vec2 temp_v2;
/* Vertices */
temp_v3.x = -1; temp_v3.y = -1; temp_v3.z = 0; array_push(vertices, temp_v3, vec3);
temp_v3.x = 1; temp_v3.y = -1; temp_v3.z = 0; array_push(vertices, temp_v3, vec3);
temp_v3.x = 1; temp_v3.y = 1; temp_v3.z = 0; array_push(vertices, temp_v3, vec3);
temp_v3.x = -1; temp_v3.y = 1; temp_v3.z = 0; array_push(vertices, temp_v3, vec3);
/* Normals */
temp_v3.x = 0; temp_v3.y = 1; temp_v3.z = 0; array_push(normals, temp_v3, vec3);
temp_v3.x = 0; temp_v3.y = 1; temp_v3.z = 0; array_push(normals, temp_v3, vec3);
/* Uvs */
temp_v2.x = 0; temp_v2.y = 0; array_push(uvs, temp_v2, vec2);
temp_v2.x = 1; temp_v2.y = 0; array_push(uvs, temp_v2, vec2);
temp_v2.x = 1; temp_v2.y = 1; array_push(uvs, temp_v2, vec2);
temp_v2.x = 0; temp_v2.y = 1; array_push(uvs, temp_v2, vec2);
/* Indices */
array_push(indices, 0, uint); array_push(indices, 1, uint); array_push(indices, 2, uint);
array_push(indices, 2, uint); array_push(indices, 3, uint); array_push(indices, 0, uint);
renderer->quad_geo = geom_create("Quad", vertices, uvs, normals, indices, NULL);
array_free(vertices);
array_free(uvs);
array_free(normals);
array_free(indices);
int width = -1, height = -1;
struct Game_State* game_state = game_state_get();
platform->window.get_size(game_state->window, &width, &height);
renderer->def_albedo_tex = texture_create("def_albedo_texture",
TU_DIFFUSE,
width, height,
GL_RGB,
GL_RGB16F,
GL_FLOAT,
NULL);
texture_set_param(renderer->def_albedo_tex, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
texture_set_param(renderer->def_albedo_tex, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
texture_set_param(renderer->def_albedo_tex, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
texture_set_param(renderer->def_albedo_tex, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
renderer->def_depth_tex = texture_create("def_depth_texture",
TU_SHADOWMAP4,
width, height,
GL_DEPTH_COMPONENT,
GL_DEPTH_COMPONENT32F,
GL_FLOAT,
NULL);
texture_set_param(renderer->def_depth_tex, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
texture_set_param(renderer->def_depth_tex, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
texture_set_param(renderer->def_depth_tex, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
texture_set_param(renderer->def_depth_tex, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
texture_set_param(renderer->def_depth_tex, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
texture_set_param(renderer->def_depth_tex, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
renderer->def_fbo = framebuffer_create(width, height, true, false, true);
framebuffer_texture_set(renderer->def_fbo, renderer->def_albedo_tex, FA_COLOR_ATTACHMENT0);
framebuffer_texture_set(renderer->def_fbo, renderer->def_depth_tex, FA_DEPTH_ATTACHMENT);
renderer->composition_shader = shader_create("fbo.vert", "fbo.frag");
renderer->debug_shader = shader_create("debug.vert", "debug.frag");
renderer->num_culled_slot = editor_debugvar_slot_create("Culled Geom", VT_INT);
renderer->num_rendered_slot = editor_debugvar_slot_create("Rendered Geom", VT_INT);
renderer->num_indices_slot = editor_debugvar_slot_create("Total Indices", VT_INT);
renderer->sprite_batch = malloc(sizeof(*renderer->sprite_batch));
if(!renderer->sprite_batch)
{
log_error("renderer:init", "Failed to allocated sprite batch");
}
else
{
sprite_batch_create(renderer->sprite_batch, "sprite_map.tga", "sprite.vert", "sprite.frag", GL_TRIANGLES);
}
im_init();
// Initialize materials
for(int i = 0; i < MAT_MAX; i++)
{
material_init(&renderer->materials[i], i);
}
}
void renderer_draw(struct Renderer* renderer, struct Scene* scene)
{
/* Render each camera output into it's framebuffer or to the default framebuffer */
for(int i = 0; i < MAX_CAMERAS; i++)
{
struct Camera* camera = &scene->cameras[i];
if(!camera->base.active) continue;
int fbo = camera->fbo == -1 ? renderer->def_fbo : camera->fbo;
framebuffer_bind(fbo);
{
glViewport(0, 0, framebuffer_width_get(fbo), framebuffer_height_get(fbo));
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
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);
static mat4 mvp;
for(int i = 0; i < MAT_MAX; i++)
{
/* for each material, get all the registered models and render them */
struct Material* material = &renderer->materials[i];
GL_CHECK(shader_bind(material->shader));
if(material->lit) /* Set light information */
{
char uniform_name[MAX_UNIFORM_NAME_LEN];
memset(uniform_name, '\0', MAX_UNIFORM_NAME_LEN);
int light_count = -1;
for(int i = 0; i < MAX_LIGHTS; i++)
{
struct Light* light = &scene->lights[i]; /* TODO: Cull lights according to camera frustum */
if(!light->base.active && light->valid) continue;
light_count++;
vec3 light_pos = {0, 0, 0};
transform_get_absolute_position(&light->base, &light_pos);
if(light->type != LT_POINT)
{
snprintf(uniform_name, MAX_UNIFORM_NAME_LEN, "lights[%d].direction", light_count);
vec3 light_dir = {0.f, 0.f, 0.f};
transform_get_absolute_lookat(&light->base, &light_dir);
vec3_norm(&light_dir, &light_dir);
shader_set_uniform_vec3(material->shader, uniform_name, &light_dir);
memset(uniform_name, '\0', MAX_UNIFORM_NAME_LEN);
}
if(light->type != LT_DIR)
{
snprintf(uniform_name, MAX_UNIFORM_NAME_LEN, "lights[%d].position", light_count);
shader_set_uniform_vec3(material->shader, uniform_name, &light_pos);
memset(uniform_name, '\0', MAX_UNIFORM_NAME_LEN);
snprintf(uniform_name, MAX_UNIFORM_NAME_LEN, "lights[%d].outer_angle", light_count);
shader_set_uniform_float(material->shader, uniform_name, light->outer_angle);
memset(uniform_name, '\0', MAX_UNIFORM_NAME_LEN);
snprintf(uniform_name, MAX_UNIFORM_NAME_LEN, "lights[%d].inner_angle", light_count);
shader_set_uniform_float(material->shader, uniform_name, light->inner_angle);
memset(uniform_name, '\0', MAX_UNIFORM_NAME_LEN);
snprintf(uniform_name, MAX_UNIFORM_NAME_LEN, "lights[%d].falloff", light_count);
shader_set_uniform_float(material->shader, uniform_name, light->falloff);
memset(uniform_name, '\0', MAX_UNIFORM_NAME_LEN);
snprintf(uniform_name, MAX_UNIFORM_NAME_LEN, "lights[%d].radius", light_count);
shader_set_uniform_int(material->shader, uniform_name, light->radius);
memset(uniform_name, '\0', MAX_UNIFORM_NAME_LEN);
}
snprintf(uniform_name, MAX_UNIFORM_NAME_LEN, "lights[%d].color", light_count);
shader_set_uniform_vec3(material->shader, uniform_name, &light->color);
memset(uniform_name, '\0', MAX_UNIFORM_NAME_LEN);
snprintf(uniform_name, MAX_UNIFORM_NAME_LEN, "lights[%d].intensity", light_count);
shader_set_uniform_float(material->shader, uniform_name, light->intensity);
memset(uniform_name, '\0', MAX_UNIFORM_NAME_LEN);
snprintf(uniform_name, MAX_UNIFORM_NAME_LEN, "lights[%d].type", light_count);
shader_set_uniform_int(material->shader, uniform_name, light->type);
memset(uniform_name, '\0', MAX_UNIFORM_NAME_LEN);
}
light_count++; // this variable is going to be used for looping an array so increase its length by one
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_TOTAL_LIGHTS].type, material->pipeline_params[MPP_TOTAL_LIGHTS].location, &light_count));
vec3 camera_pos = {0, 0, 0};
transform_get_absolute_position(&camera->base, &camera_pos);
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_CAM_POS].type, material->pipeline_params[MPP_CAM_POS].location, &camera_pos));
}
/* Set material pipeline uniforms */
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_FOG_MODE].type, material->pipeline_params[MPP_FOG_MODE].location, &renderer->settings.fog.mode));
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_FOG_DENSITY].type, material->pipeline_params[MPP_FOG_DENSITY].location, &renderer->settings.fog.density));
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_FOG_START_DIST].type, material->pipeline_params[MPP_FOG_START_DIST].location, &renderer->settings.fog.start_dist));
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_FOG_MAX_DIST].type, material->pipeline_params[MPP_FOG_MAX_DIST].location, &renderer->settings.fog.max_dist));
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_FOG_COLOR].type, material->pipeline_params[MPP_FOG_COLOR].location, &renderer->settings.fog.color));
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_AMBIENT_LIGHT].type, material->pipeline_params[MPP_AMBIENT_LIGHT].location, &renderer->settings.ambient_light));
if(material->lit) GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_VIEW_MAT].type, material->pipeline_params[MPP_VIEW_MAT].location, &camera->view_mat));
for(int j = 0; j < MAX_MATERIAL_REGISTERED_STATIC_MESHES; j++)
{
if(!material->registered_static_meshes[j]) continue;
/* for each registered model, set up uniforms and render */
struct Static_Mesh* mesh = material->registered_static_meshes[j];
struct Geometry* geometry = geom_get(mesh->model.geometry_index);
/* Check if model is in frustum */
vec3 abs_pos, abs_scale;
transform_get_absolute_position(&mesh->base, &abs_pos);
transform_get_absolute_scale(&mesh->base, &abs_scale);
int intersection = bv_intersect_frustum_sphere(&camera->frustum, &geometry->bounding_sphere, &abs_pos, &abs_scale);
if(intersection == IT_OUTSIDE)
{
renderer->num_culled++;
continue;
}
else
{
renderer->num_indices += array_len(geometry->indices);
renderer->num_rendered++;
}
/* set material params for the model */
for(int k = 0; k < MMP_MAX; k++)
{
switch(mesh->model.material_params[k].type)
{
case VT_INT: GL_CHECK(shader_set_uniform(material->model_params[k].type, material->model_params[k].location, &mesh->model.material_params[k].val_int)); break;
case VT_FLOAT: GL_CHECK(shader_set_uniform(material->model_params[k].type, material->model_params[k].location, &mesh->model.material_params[k].val_float)); break;
case VT_VEC3: GL_CHECK(shader_set_uniform(material->model_params[k].type, material->model_params[k].location, &mesh->model.material_params[k].val_vec3)); break;
case VT_VEC4: GL_CHECK(shader_set_uniform(material->model_params[k].type, material->model_params[k].location, &mesh->model.material_params[k].val_vec4)); break;
}
}
/* Set pipeline uniforms that are derived per model */
mat4_identity(&mvp);
mat4_mul(&mvp, &camera->view_proj_mat, &mesh->base.transform.trans_mat);
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_MVP].type, material->pipeline_params[MPP_MVP].location, &mvp));
if(material->lit)
{
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_VIEW_MAT].type, material->pipeline_params[MPP_VIEW_MAT].location, &camera->view_mat));
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_MODEL_MAT].type, material->pipeline_params[MPP_MODEL_MAT].location, &mesh->base.transform.trans_mat));
mat4 inv_mat;
mat4_identity(&inv_mat);
mat4_inverse(&inv_mat, &mesh->base.transform.trans_mat);
GL_CHECK(shader_set_uniform(material->pipeline_params[MPP_INV_MODEL_MAT].type, material->pipeline_params[MPP_INV_MODEL_MAT].location, &inv_mat));
}
/* Render the geometry */
//int indices = geom_render_in_frustum(model->geometry_index, &viewer->camera.frustum[0], entity, draw_mode);
//geom_render(model->geometry_index, draw_mode);
geom_render(mesh->model.geometry_index, GDM_TRIANGLES);
for(int k = 0; k < MMP_MAX; k++)
{
/* unbind textures, if any */
if(material->model_params[k].type == UT_TEX)
GL_CHECK(texture_unbind(mesh->model.material_params[k].val_int));
}
}
shader_unbind();
}
editor_debugvar_slot_set_int(renderer->num_rendered_slot, renderer->num_rendered);
editor_debugvar_slot_set_int(renderer->num_culled_slot, renderer->num_culled);
editor_debugvar_slot_set_int(renderer->num_indices_slot, renderer->num_indices);
renderer->num_culled = renderer->num_rendered = renderer->num_indices = 0;
}
framebuffer_unbind();
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
}
/* Final Render */
struct Camera* active_camera = &scene->cameras[scene->active_camera_index];
int width, height;
struct Game_State* game_state = game_state_get();
platform->window.get_size(game_state->window, &width, &height);
glViewport(0, 0, width, height);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
shader_bind(renderer->composition_shader);
int final_render_tex = active_camera->render_tex == -1 ? renderer->def_albedo_tex : active_camera->render_tex;
texture_bind(final_render_tex);
geom_render(renderer->quad_geo, GDM_TRIANGLES);
texture_unbind(final_render_tex);
shader_unbind();
/* Debug Render */
struct Hashmap* cvars = platform->config.get();
if(hashmap_bool_get(cvars, "debug_draw_enabled"))
{
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
vec4 debug_draw_color = hashmap_vec4_get(cvars, "debug_draw_color");
shader_bind(renderer->debug_shader);
{
static mat4 mvp;
shader_set_uniform_vec4(renderer->debug_shader, "debug_color", &debug_draw_color);
for(int i = 0; i < MAX_STATIC_MESHES; i++)
{
struct Static_Mesh* mesh = &scene->static_meshes[i];
if(!mesh->base.active) continue;
struct Model* model = &mesh->model;
struct Transform* transform = &mesh->base.transform;
int geometry = model->geometry_index;
mat4_identity(&mvp);
mat4_mul(&mvp, &active_camera->view_proj_mat, &transform->trans_mat);
shader_set_uniform_mat4(renderer->debug_shader, "mvp", &mvp);
geom_render(geometry, hashmap_int_get(cvars, "debug_draw_mode"));
}
}
shader_unbind();
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
}
// Debug Physics render
if(hashmap_bool_get(cvars, "debug_draw_physics"))
{
static vec4 physics_draw_color = { 0.f, 0.f, 1.f, 1.f };
for(int i = 0; i < MAX_STATIC_MESHES; i++)
{
struct Static_Mesh* mesh = &scene->static_meshes[i];
if(!mesh->base.active || (!mesh->collision.collision_shape && !mesh->collision.rigidbody)) continue;
//Get collision mesh and it's props then render it
vec3 pos = {0.f};
quat rot = {0.f, 0.f, 0.f, 1.f };
if(mesh->collision.rigidbody)
{
platform->physics.body_position_get(mesh->collision.rigidbody, &pos.x, &pos.y, &pos.z);
platform->physics.body_rotation_get(mesh->collision.rigidbody, &rot.x, &rot.y, &rot.z, &rot.w);
}
else
{
platform->physics.cs_position_get(mesh->collision.collision_shape, &pos.x, &pos.y, &pos.z);
platform->physics.cs_rotation_get(mesh->collision.collision_shape, &rot.x, &rot.y, &rot.z, &rot.w);
}
int collision_shape_type = platform->physics.cs_type_get(mesh->collision.collision_shape);
switch(collision_shape_type)
{
case CST_SPHERE:
{
float radius = platform->physics.cs_sphere_radius_get(mesh->collision.collision_shape);
im_sphere(radius, pos, rot, physics_draw_color, GDM_TRIANGLES);
}
break;
case CST_BOX:
{
float x = 0.f, y = 0.f, z = 0.f;
platform->physics.cs_box_params_get(mesh->collision.collision_shape, &x, &y, &z);
im_box(x, y, z, pos, rot, physics_draw_color, GDM_TRIANGLES);
};
break;
default: break;
}
}
}
//Immediate mode geometry render
im_render(active_camera);
/* Render 2D stuff */
shader_bind(renderer->sprite_batch->shader);
{
static mat4 ortho_mat;
mat4_identity(&ortho_mat);
int width, height;
struct Game_State* game_state = game_state_get();
platform->window.get_size(game_state->window, &width, &height);
mat4_ortho(&ortho_mat, 0.f, (float)width, (float)height, 0.f, -10.f, 10.f);
shader_set_uniform_mat4(renderer->sprite_batch->shader, "mvp", &ortho_mat);
sprite_batch_render(renderer->sprite_batch);
}
shader_unbind();
/* Render UI */
gui_render(NK_ANTI_ALIASING_ON);
}
void renderer_cleanup(struct Renderer* renderer)
{
for(int i = 0; i < MAT_MAX; i++)
{
material_reset(&renderer->materials[i], i);
}
im_cleanup();
sprite_batch_remove(renderer->sprite_batch);
free(renderer->sprite_batch);
gui_cleanup();
geom_remove(renderer->quad_geo);
framebuffer_remove(renderer->def_fbo);
texture_remove(renderer->def_albedo_tex);
texture_remove(renderer->def_depth_tex);
}
void on_framebuffer_size_change(int width, int height)
{
struct Scene* scene = game_state_get()->scene;
float aspect = (float)width / (float)height;
for(int i = 0; i < MAX_CAMERAS; i++)
{
struct Camera* viewer = &scene->cameras[i];
viewer->aspect_ratio = aspect > 0.f ? aspect : 4.f / 3.f;
camera_update_proj(viewer);
}
framebuffer_resize_all(width, height);
}
void renderer_clearcolor_set(float red, float green, float blue, float alpha)
{
glClearColor(red, green, blue, alpha);
}
struct Material * renderer_material_get(int material_type)
{
return NULL;
}
void renderer_debug_draw_enabled(bool enabled)
{
struct Hashmap* cvars = platform->config.get();
hashmap_bool_set(cvars, "debug_draw_enabled", enabled);
}
void renderer_settings_get(struct Render_Settings* settings)
{
struct Hashmap* cvars = platform->config.get();
settings->fog.mode = hashmap_int_get(cvars, "fog_mode");
settings->fog.density = hashmap_float_get(cvars, "fog_density");
settings->fog.start_dist = hashmap_float_get(cvars, "fog_start_dist");
settings->fog.max_dist = hashmap_float_get(cvars, "fog_max_dist");
settings->fog.color = hashmap_vec3_get(cvars, "fog_color");
settings->debug_draw_enabled = hashmap_bool_get(cvars, "debug_draw_enabled");
settings->debug_draw_physics = hashmap_bool_get(cvars, "debug_draw_physics");
settings->debug_draw_mode = hashmap_int_get(cvars, "debug_draw_mode");
settings->debug_draw_color = hashmap_vec4_get(cvars, "debug_draw_color");
settings->ambient_light = hashmap_vec3_get(cvars, "ambient_light");
}
void renderer_settings_set(const struct Render_Settings* settings)
{
struct Hashmap* cvars = platform->config.get();
hashmap_int_set(cvars, "fog_mode", settings->fog.mode);
hashmap_float_set(cvars, "fog_density", settings->fog.density);
hashmap_float_set(cvars, "fog_start_dist", settings->fog.start_dist);
hashmap_float_set(cvars, "fog_max_dist", settings->fog.max_dist);
hashmap_vec3_set(cvars, "fog_color", &settings->fog.color);
hashmap_bool_set(cvars, "debug_draw_enabled", settings->debug_draw_enabled);
hashmap_bool_set(cvars, "debug_draw_physics", settings->debug_draw_physics);
hashmap_int_set(cvars, "debug_draw_mode", settings->debug_draw_mode);
hashmap_vec4_set(cvars, "debug_draw_color", &settings->debug_draw_color);
hashmap_vec3_set(cvars, "ambient_light", &settings->ambient_light);
}