Implement horizontal translation, axis cycling, better ways to deselect objects and keybindings for grid scale selction in editor

src/game/editor.c

@@ -55,7 +55,7 @@ enum Editor_Mode
 
 enum Editor_Axis
 {
-	EDITOR_AXIS_XY = 0,
+	EDITOR_AXIS_XZ = 0,
 	EDITOR_AXIS_X,
 	EDITOR_AXIS_Y,
 	EDITOR_AXIS_Z
@@ -72,6 +72,7 @@ static int                    window_flags    = NK_WINDOW_BORDER |
 static void editor_on_mousebutton(const struct Event* event);
 static void editor_on_mousemotion(const struct Event* event);
 static void editor_on_key_release(const struct Event* event);
+static void editor_on_key_press(const struct Event* event);
 static void editor_camera_update(struct Editor* editor, float dt);
 static void editor_show_entity_in_list(struct Editor* editor, struct nk_context* context, struct Scene* scene, struct Entity* entity);
 static void editor_widget_color_combov3(struct nk_context* context, vec3* color, int width, int height);
@@ -92,6 +93,8 @@ static void editor_window_debug_variables(struct nk_context* context, struct Edi
 static void editor_window_property_inspector(struct nk_context* context, struct Editor* editor, struct Game_State* game_state);
 static void editor_window_renderer_settings(struct nk_context* context, struct Editor* editor, struct Game_State* game_state);
 static void editor_window_settings_editor(struct nk_context* context, struct Editor* editor, struct Game_State* game_state);
+static void editor_axis_set(int axis);
+static void editor_entity_select(struct Editor* editor, struct Entity* entity);
 
 void editor_init(struct Editor* editor)
 {
@@ -107,14 +110,15 @@ void editor_init(struct Editor* editor)
     editor->camera_move_speed         = 20.f;
     editor->camera_sprint_multiplier  = 2.f;
 	editor->current_mode              = EDITOR_MODE_NORMAL;
-	editor->current_axis              = EDITOR_AXIS_XY;
+	editor->current_axis              = EDITOR_AXIS_XZ;
+	editor->previous_axis             = EDITOR_AXIS_XZ;
 	editor->grid_enabled              = 1;
 	editor->grid_num_lines            = 100;
 	editor->grid_scale                = 1.f;
 	editor->tool_mesh_draw_enabled    = 0;
 	editor->tool_snap_enabled         = 1;
 	vec3_fill(&editor->tool_mesh_position, 0.f, 0.f, 0.f);
-	vec4_fill(&editor->tool_mesh_color, 1.f, 0.f, 1.f, 1.f);
+	vec4_fill(&editor->tool_mesh_color, 0.f, 0.3f, 1.f, 1.f);
 	vec4_fill(&editor->selected_entity_colour, 0.f, 1.f, 0.f, 1.f);
 	vec4_fill(&editor->grid_color, 0.3f, 0.3f, 0.3f, 1.f);
     debug_vars_list                   = array_new(struct Debug_Variable);
@@ -125,6 +129,7 @@ void editor_init(struct Editor* editor)
 	event_manager_subscribe(event_manager, EVT_MOUSEMOTION, &editor_on_mousemotion);
 	event_manager_subscribe(event_manager, EVT_MOUSEBUTTON_RELEASED, &editor_on_mousebutton);
 	event_manager_subscribe(event_manager, EVT_KEY_RELEASED, &editor_on_key_release);
+	event_manager_subscribe(event_manager, EVT_KEY_PRESSED, &editor_on_key_press);
 }
 
 void editor_init_camera(struct Editor* editor, struct Hashmap* cvars)
@@ -353,7 +358,30 @@ void editor_update(struct Editor* editor, float dt)
 	{
 		if(editor->current_mode == EDITOR_MODE_TRANSLATE)
 		{
-			im_sphere(1.f, editor->tool_mesh_position, (quat) { 0.f, 0.f, 0.f, 1.f }, editor->tool_mesh_color, GDM_TRIANGLES);
+			im_sphere(0.5f, editor->tool_mesh_position, (quat) { 0.f, 0.f, 0.f, 1.f }, editor->tool_mesh_color, GDM_TRIANGLES);
+			//im_box(editor->grid_scale, editor->grid_scale, editor->grid_scale, editor->tool_mesh_position, (quat) { 0.f, 0.f, 0.f, 1.f }, editor->tool_mesh_color, GDM_TRIANGLES);
+
+			im_begin(editor->tool_mesh_position, (quat) { 0.f, 0.f, 0.f, 1.f }, (vec3) { 1.f, 1.f, 1.f }, (vec4) { 0.f, 1.f, 1.f, 1.f }, GDM_LINES);
+			switch(editor->current_axis)
+			{
+			case EDITOR_AXIS_XZ:
+				im_pos(-editor->grid_num_lines * editor->grid_scale, 0.f, 0.f); im_pos(editor->grid_num_lines * editor->grid_scale, 0.f, 0.f);
+				im_pos(0.f, 0.f, -editor->grid_num_lines * editor->grid_scale); im_pos(0.f, 0.f, editor->grid_num_lines * editor->grid_scale);
+				break;
+			case EDITOR_AXIS_Y:
+				im_pos(0.f, -editor->grid_num_lines * editor->grid_scale, 0.f);
+				im_pos(0.f, editor->grid_num_lines * editor->grid_scale, 0.f);
+				break;
+			case EDITOR_AXIS_X:
+				im_pos(-editor->grid_num_lines * editor->grid_scale, 0.f, 0.f);
+				im_pos(editor->grid_num_lines * editor->grid_scale, 0.f, 0.f);
+				break;
+			case EDITOR_AXIS_Z:
+				im_pos(0.f, 0.f, -editor->grid_num_lines * editor->grid_scale);
+				im_pos(0.f, 0.f, editor->grid_num_lines * editor->grid_scale);
+				break;
+			}
+			im_end();
 		}
 	}
 }
@@ -378,7 +406,6 @@ void editor_on_mousebutton(const struct Event* event)
 		int mouse_x = 0, mouse_y = 0;
 		platform_mouse_position_get(&mouse_x, &mouse_y);
 		struct Ray ray = camera_screen_coord_to_ray(editor_camera, mouse_x, mouse_y);
-		//log_message("Ray: %.3f, %.3f, %.3f", ray.direction.x, ray.direction.y, ray.direction.z); 
 
 		struct Scene* scene = game_state_get()->scene;
 		struct Raycast_Result ray_result;
@@ -388,15 +415,7 @@ void editor_on_mousebutton(const struct Event* event)
 		{
 			//For now, just select the first entity that is intersected 
 			struct Entity* intersected_entity = ray_result.entities_intersected[0];
-
+			editor_entity_select(editor, intersected_entity);
-			if(editor->selected_entity && editor->selected_entity != intersected_entity)
-			{
-				editor->selected_entity->editor_selected = false;
-				editor->selected_entity = NULL;
-			}
-
-			intersected_entity->editor_selected = true;
-			editor->selected_entity = intersected_entity;
 		}
 		else
 		{
@@ -409,8 +428,7 @@ void editor_on_mousebutton(const struct Event* event)
 				else
 				{
 					//Deselect the currently selected entity if nothing was found
-					editor->selected_entity->editor_selected = false;
+					editor_entity_select(editor, NULL);
-					editor->selected_entity = NULL;
 				}
 			}
 		}
@@ -439,6 +457,13 @@ void editor_on_mousemotion(const struct Event* event)
 			struct Ray cam_ray;
 			cam_ray = camera_screen_coord_to_ray(editor_camera, event->mousemotion.x, event->mousemotion.y);
 
+			switch(editor->current_axis)
+			{
+			case EDITOR_AXIS_X: editor->tool_mesh_position.x +=  event->mousemotion.xrel; break;
+			case EDITOR_AXIS_Y: editor->tool_mesh_position.y += -event->mousemotion.yrel; break;
+			case EDITOR_AXIS_Z: editor->tool_mesh_position.z += -event->mousemotion.yrel; break;
+			case EDITOR_AXIS_XZ:
+			{
 				Plane ground_plane;
 				plane_init(&ground_plane, &(vec3){0.f, 1.f, 0.f}, &position);
 
@@ -450,14 +475,18 @@ void editor_on_mousemotion(const struct Event* event)
 					transform_get_absolute_forward(editor_camera, &cam_forward);
 					vec3_scale(&projected_point, &cam_ray.direction, distance);
 					vec3_add(&position, &projected_point, &abs_cam_pos);
-				if(editor->tool_snap_enabled)
-				{
-					position.x = roundf(position.x / editor->grid_scale) * editor->grid_scale;
-					position.y = roundf(position.y / editor->grid_scale) * editor->grid_scale;
-					position.z = roundf(position.z / editor->grid_scale) * editor->grid_scale;
 					vec3_assign(&editor->tool_mesh_position, &position);
 				}
 			}
+			break;
+			}
+
+			if(editor->tool_snap_enabled)
+			{
+				editor->tool_mesh_position.x = roundf(editor->tool_mesh_position.x / editor->grid_scale) * editor->grid_scale;
+				editor->tool_mesh_position.y = roundf(editor->tool_mesh_position.y / editor->grid_scale) * editor->grid_scale;
+				editor->tool_mesh_position.z = roundf(editor->tool_mesh_position.z / editor->grid_scale) * editor->grid_scale;
+			}
 		}
 	}
 	break;
@@ -468,6 +497,11 @@ void editor_on_mousemotion(const struct Event* event)
 void editor_on_key_release(const struct Event* event)
 {
 	struct Editor* editor = game_state_get()->editor;
+	struct Gui*    gui    = game_state_get()->gui;
+
+	if(!nk_window_is_any_hovered(&gui->context))
+	{
+		/* Mode Cycle */
 		if(event->key.key == KEY_TAB)
 		{
 			editor->current_mode++;
@@ -476,6 +510,7 @@ void editor_on_key_release(const struct Event* event)
 
 		}
 
+		/* Mode Select */
 		if(!editor->camera_looking_around)
 		{
 			if(event->key.key == KEY_Q) editor->current_mode = EDITOR_MODE_NORMAL;
@@ -484,12 +519,85 @@ void editor_on_key_release(const struct Event* event)
 			if(event->key.key == KEY_R) editor->current_mode = EDITOR_MODE_SCALE;
 		}
 
+		/* Axis select */
+		int selected_axis = editor->current_axis;
+		if(event->key.key == KEY_X) selected_axis = EDITOR_AXIS_X;
+		if(event->key.key == KEY_Y) selected_axis = EDITOR_AXIS_Y;
+		if(event->key.key == KEY_Z) selected_axis = EDITOR_AXIS_Z;
+		if(event->key.key == KEY_Y && input_is_key_pressed(KEY_LSHIFT)) selected_axis = EDITOR_AXIS_XZ;
+		if(event->key.key == KEY_ALT) selected_axis = editor->previous_axis;
+		editor_axis_set(selected_axis);
+		
+		/* Grid Scale select */
+		if(event->key.key == KEY_1) editor->grid_scale = 1.f;
+		if(event->key.key == KEY_2) editor->grid_scale = 2.f;
+		if(event->key.key == KEY_3) editor->grid_scale = 3.f;
+		if(event->key.key == KEY_4) editor->grid_scale = 4.f;
+		if(event->key.key == KEY_5) editor->grid_scale = 5.f;
+		if(event->key.key == KEY_6) editor->grid_scale = 6.f;
+		if(event->key.key == KEY_7) editor->grid_scale = 7.f;
+		if(event->key.key == KEY_8) editor->grid_scale = 8.f;
+		if(event->key.key == KEY_9) editor->grid_scale = 9.f;
+		if(event->key.key == KEY_0) editor->grid_scale = 0.5f;
+
+		if(event->key.key == KEY_G) editor->grid_enabled = !editor->grid_enabled;
+		if(event->key.key == KEY_ESCAPE) editor_entity_select(editor, NULL);
+	}
+
 	if(editor->current_mode == EDITOR_MODE_TRANSLATE)
 		editor->tool_mesh_draw_enabled = 1;
 	else
 		editor->tool_mesh_draw_enabled = 0;
 }
 
+void editor_entity_select(struct Editor* editor, struct Entity* entity)
+{
+	if(!entity && editor->selected_entity) // Deselect
+	{
+		editor->selected_entity->editor_selected = false;
+		editor->selected_entity = NULL;
+	}
+	else if(entity) // Select
+	{
+		if(editor->selected_entity && editor->selected_entity != entity)
+		{
+			editor->selected_entity->editor_selected = false;
+			editor->selected_entity = NULL;
+		}
+
+		entity->editor_selected = true;
+		editor->selected_entity = entity;
+		transform_get_absolute_position(editor->selected_entity, &editor->tool_mesh_position);
+	}
+}
+
+void editor_on_key_press(const struct Event* event)
+{
+	struct Editor* editor = game_state_get()->editor;
+	if(!nk_window_is_any_hovered(&game_state_get()->gui->context))
+	{
+		if(event->key.key == KEY_ALT) editor_axis_set(EDITOR_AXIS_Y);
+	}
+}
+
+void editor_axis_set(int axis)
+{
+	struct Editor* editor = game_state_get()->editor;
+	if(editor->current_axis != axis)
+	{
+		if(axis != editor->current_axis)
+		{
+			editor->previous_axis = editor->current_axis;
+			editor->current_axis  = axis;
+
+			/* Reset tool position after axis has changed */
+			if(editor->selected_entity)
+			{
+				transform_get_absolute_position(editor->selected_entity, &editor->tool_mesh_position);
+			}
+		}
+	}
+}
 void editor_camera_update(struct Editor* editor, float dt)
 {
     struct Camera* editor_camera = &game_state_get()->scene->cameras[CAM_EDITOR];
@@ -561,6 +669,8 @@ void editor_camera_update(struct Editor* editor, float dt)
     }
 
     /* Movement */
+	if(editor->camera_looking_around)
+	{
 		if(input_map_state_get("Sprint", KS_PRESSED)) move_speed *= editor->camera_sprint_multiplier;
 		if(input_map_state_get("Move_Forward", KS_PRESSED)) offset.z -= move_speed;
 		if(input_map_state_get("Move_Backward", KS_PRESSED)) offset.z += move_speed;
@@ -576,6 +686,7 @@ void editor_camera_update(struct Editor* editor, float dt)
 			//log_message("Position : %s", tostr_vec3(&transform->position));
 		}
 	}
+}
 
 void editor_widget_color_combov3(struct nk_context* context, vec3* color, int width, int height)
 {
@@ -663,6 +774,7 @@ void editor_cleanup(struct Editor* editor)
 }
 
 
+
 bool editor_widget_v3(struct nk_context* context, vec3* value, const char* name_x, const char* name_y, const char* name_z, float min, float max, float step, float inc_per_pixel, int row_height)
 {
     bool changed = false;

src/game/editor.h

@@ -24,6 +24,7 @@ struct Editor
 	vec4           selected_entity_colour;
 	int            current_mode;
 	int            current_axis;
+	int            previous_axis;
 	int            grid_enabled;
 	vec4           grid_color;
 	int            grid_num_lines;

src/game/game.c

@@ -496,7 +496,6 @@ bool game_run(void)
 		if(delta_time > MAX_FRAME_TIME) delta_time = (1.f / 60.f); /* To deal with resuming from breakpoint we artificially set delta time */
 
 		gui_input_begin(game_state->gui);
-        //platform_poll_events(&should_window_close);
 		event_manager_poll_events(game_state->event_manager, &should_window_close);
 		gui_input_end(game_state->gui);
 		
@@ -510,7 +509,7 @@ bool game_run(void)
 
 void game_update(float dt, bool* window_should_close)
 {	
-    if(input_is_key_pressed(KEY_ESCAPE))                      *window_should_close = true;
+    //if(input_is_key_pressed(KEY_ESCAPE))                      *window_should_close = true;
     if(input_map_state_get("Window_Fullscreen", KS_RELEASED)) window_fullscreen_set(game_state->window, true);
     if(input_map_state_get("Window_Maximize",   KS_RELEASED)) window_fullscreen_set(game_state->window, false);
     if(input_map_state_get("Console_Toggle",    KS_RELEASED)) console_toggle(game_state->console);

todo.txt

@@ -1,16 +1,20 @@
 Todo:
-	- Vertical translation in translate mode
+	- Immediate mode render order, drawing axis and helpers on top of grid
+	- Display tool/cursor location in editor statusbar
+	- Better, more accurate picking
 	- Highlight if we are about to select an entity or perform the tool action like translate when mouse is hovered and an entity can be selected at that location
 	- Display the projected position if we perform the action for example display what the new location would be right next to the tool mesh
 	- Editor Undo
 	- Scale Mode
 	- Rotate Mode
+	- Add other axis combinations like YZ and XY to transform tool
 	- Use actual selected entity's mesh for tool mesh when the entity already has a mesh and use a placeholder like a sphere when there is not mesh 
 	- Add warning to genie build script when running on windows and WindowsSdkVersion cannot be found. This happens when the script is not run from vcvarsall command prompt
 	- Improve README and add a screenshot to make the repository ready for making it public 
 	- Refactor all global application state into 'Application_Context' struct. A single global instance of which is available everywhere
 	? Improve bounding sphere calculation
 	- Change the way lights are set as uniforms to remove snprintf calls per frame for every light attribute
+	- Filter Scene heirarchy by search using entity name
 	- Screen mouse coordinates to world-coordinates for aiming
 	- Player projectiles and sounds
 	- Console commands
@@ -64,7 +68,7 @@ Todo:
 	- Profit!
 
 Improvements:
-	- Better naming semantics for examples, init/deinit for initialization and cleanup and create/destroy when memory is allocated or deallocated
+	- Better naming semantics for example, init/deinit for initialization and cleanup and create/destroy when memory is allocated or deallocated
 	- Reset mouse cursor position to the center of the screen in editor mode after the right click is released
 	- Categorized entity list in editor for example different subtree for lights and static meshes
 	- Depth testing for editor grid
@@ -222,4 +226,8 @@ Done:
 	  Modes can be toggled by hotkeys and the operation will be applied to the selected object.
 	  By default, we work on the ground axis i.e the xz plane and when we have alt pressed, we work in the vertical or y axis.
 	* Move plane creation into its own function 
+	* De-select object on escape key in editor
+	* Vertical translation in translate mode
+	* Axis selection/cycling
+	* Axis switching and returning back to previously selected axis after releasing alt in translate mode