Reset view

TODO.MD

@@ -1,6 +1,4 @@
 - Scale resolution
-- Tooltips
-- Reset zoom
 - Save grid and animation data to file
 - Load project
 - Fix focus on submenu

animation.odin

@@ -189,3 +189,11 @@ animation_draw :: proc(animation: Animation, global_transform: mat3) {
 		}
 	}
 }
+
+animation_get_center :: proc(animation: Animation) -> v2 {
+	switch animation.type {
+	case .Rectangle:
+		return linalg.lerp(animation.shapes.rectangle.tl, animation.shapes.rectangle.br, v2(0.5))
+	}
+	unreachable()
+}

program.odin

@@ -72,6 +72,7 @@ UiButtonType :: enum {
 	MatrixDelete,
 	MatrixMoveUp,
 	MatrixMoveDown,
+	CenterView,
 }
 
 UiButtonRecalculateFinishGroup :: bit_set[UiButtonType]{
@@ -609,23 +610,29 @@ program_build_workspace_ui :: proc(ctx: ^ui.Context) ->
 		button_data = new(UiElementData_Button, context.temp_allocator)
 		switch program.animation_state {
 		case .Ready:
-			button_config.label = RAYGUI_ICON_PLAY
+			button_config = {margin = button_margin, label = RAYGUI_ICON_PLAY, tooltip = "Play\nanimation"}
 			button_data^ = {type = .StartTransformation}
 		case .Paused:
-			button_config.label = RAYGUI_ICON_PLAY
+			button_config = {margin = button_margin, label = RAYGUI_ICON_PLAY, tooltip = "Resume\nanimation"}
 			button_data^ = {type = .ResumeTransformation}
 		case .Playing:
-			button_config.label = RAYGUI_ICON_PAUSE
+			button_config = {margin = button_margin, label = RAYGUI_ICON_PAUSE, tooltip = "Pause\nanimation"}
 			button_data^ = {type = .PauseTransformation}
 		}
 		ui.same_line()
 		ui.element(.Button, button_dimensions, button_config, button_data)
 
+		button_config = {margin = button_margin, label = RAYGUI_ICON_RESET, tooltip = "Reset\nanimation"}
 		button_data = new(UiElementData_Button, context.temp_allocator)
-		button_config.label = RAYGUI_ICON_RESET
 		button_data^ = {type = .ResetTransformation}
 		ui.same_line()
 		ui.element(.Button, button_dimensions, button_config, button_data)
+
+		button_config = {margin = button_margin, label = "1", tooltip = "Center\nanimation"}
+		button_data = new(UiElementData_Button, context.temp_allocator)
+		button_data^ = {type = .CenterView}
+		ui.same_line()
+		ui.element(.Button, button_dimensions, button_config, button_data)
 	}
 	ui.container_end()
 
@@ -867,6 +874,13 @@ program_render_ui_and_handle_focus :: proc(ctx: ^ui.Context, focus_element_id: u
 				case .MatrixMoveDown:
 					if data.target_matrix + 1 >= program.matrix_count do break;
 					matrix_move_to(program.matrix_float_pool, program.matrix_value_string_pool, data.target_matrix, data.target_matrix + 1)
+				case .CenterView:
+					// TODO (synthas): Could be improved to center the whole animation
+					// TODO (synthas): Reset zoom
+					world_to_grid_matrix := grid_world_to_grid_matrix(program.grid.zoom, program.grid.offset)
+					grid_to_world_matrix := linalg.inverse(world_to_grid_matrix)
+					center := animation_get_center(program.animation) / grid_get_zoom(program.grid.zoom) - program.grid.world_size / 2.0
+					program.grid.offset = center
 				}
 				if data.type in UiButtonRecalculateFinishGroup {
 					program.animation.matrix_count = program.matrix_count