Fix final animation

src/animation.odin

@@ -226,13 +226,15 @@ animation_draw :: proc(animation: Animation, global_transform: mat3, temp_alloca
 			color := linalg.lerp(color_origin, color_end, f32(i) / f32(animation.matrix_count))
 			draw_animation_rectangle_corners(rectangle, rl.Color(color))
 		}
-
-		animation_progress := math.clamp(animation.matrix_index, 0.0, f32(animation.matrix_count - 1))
+		if animation.matrix_count <= 0 {
+			break
+		}
+		animation_progress := math.clamp(animation.matrix_index, 0.0, f32(animation.matrix_count))
 		animation_progress_frame := ease.ease(animation.ease, fract(animation.matrix_index))
 		animation_progress_total := animation_progress + animation_progress_frame
 		animation_progress_fraction := animation_progress_total / f32(animation.matrix_count)
-		rectangle_previous := rectangles[i32(animation_progress)]
-		rectangle_next := rectangles[i32(animation_progress + 1)]
+		rectangle_previous := rectangles[int(animation_progress)]
+		rectangle_next := rectangles[min(int(animation_progress + 1), animation.matrix_count)]
 		rectangle_current := rectangle_corners_lerp(rectangle_previous, rectangle_next, animation_progress_frame)
 		rectangle_current_color := linalg.lerp(color_origin, color_end, animation_progress_fraction)
 		draw_animation_rectangle_corners(rectangle_current, rl.Color(rectangle_current_color))

src/grid.odin

@@ -5,7 +5,7 @@ import rl "libraries/raylib"
 
 Grid :: struct {
 	cell_size_px: v2,
-	zoom_previous, zoom: v2,
+	zoom: v2,
 	offset: v2,
 }
 

src/program.odin

@@ -111,6 +111,7 @@ UiButtonType :: enum {
 	PauseTransformation,
 	ResumeTransformation,
 	ResetTransformation,
+	ResetGrid,
 	MatrixDelete,
 	MatrixMoveUp,
 	MatrixMoveDown,
@@ -336,6 +337,8 @@ program_save_project :: proc(program: ^Program, path: string) -> ProjectWriteErr
 	project := ProjectData {
 		matrix_count = u32(program.matrix_count),
 		matrices = program.matrix_float_pool,
+		grid = program.grid,
+		shapes = program.animation.shapes,
 	}
 	project_write(&project, path) or_return
 	return nil
@@ -360,6 +363,8 @@ program_load_project :: proc(program: ^Program, path: string) -> ProjectReadErro
 	project.matrices = program.matrix_float_pool
 	project_read(&project, path) or_return
 	program.matrix_count = int(project.matrix_count)
+	program.grid = project.grid
+	program.animation.shapes = project.shapes
 	for val, i in program.matrix_float_pool[:program.matrix_count * 9] {
 		fmt.bprint(program.matrix_value_string_pool[i][:], val)
 	}
@@ -818,6 +823,12 @@ program_build_workspace_ui :: proc(ctx: ^ui.Context) -> (elements: []ui.Element,
 		ui.same_line()
 		ui.element(.Button, button_dimensions, button_config, button_data)
 
+		button_config = {margin = button_margin, label = RAYGUI_ICON_RESET, tooltip = "Reset\ngrid"}
+		button_data = new(UiElementData_Button, context.temp_allocator)
+		button_data^ = {type = .ResetGrid}
+		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}
@@ -1089,6 +1100,10 @@ program_render_ui_and_handle_focus :: proc(ctx: ^ui.Context, focus_element_id: u
 				case .ProjectLoad:
 					program_show_dialog(&program, .LoadProject)
 				case .ProjectNew:
+				case .ResetGrid:
+					program.grid.offset = program_screen_size() / 2.0
+					program.grid.zoom = 1.0
+					program.grid.cell_size_px = 50.0
 				case .DismissError:
 					program.state = .Normal
 				}

src/project.odin

@@ -8,7 +8,7 @@ ProjectData :: struct {
 	matrix_count: u32,
 	matrices: []f32,
 	grid: Grid,
-	animation: Animation,
+	shapes: AnimationShapes,
 }
 
 project_write :: proc(project: ^ProjectData, path: string) -> ProjectWriteError {

src/project_default.odin

@@ -34,7 +34,9 @@ _project_write :: proc(project: ^ProjectData, path: string) -> ProjectWriteError
 	io.write_full(w, transmute([]u8)header) or_return
 	io.write_ptr(w, &version, size_of(version)) or_return
 	io.write_ptr(w, &project.matrix_count, size_of(project.matrix_count)) or_return
-	n := io.write_ptr(w, raw_data(project.matrices), int(project.matrix_count) * 9 * size_of(f32)) or_return
+	_ = io.write_ptr(w, raw_data(project.matrices), int(project.matrix_count) * 9 * size_of(f32)) or_return
+	_ = io.write_ptr(w, &project.grid, size_of(project.grid)) or_return
+	_ = io.write_ptr(w, &project.shapes, size_of(project.shapes)) or_return
 	os.close(f)
 	return nil
 }
@@ -56,6 +58,8 @@ _project_read :: proc(project: ^ProjectData, path: string) -> ProjectReadError {
 		return ProjectReadErrorType.VersionNeedsUpgrade
 	}
 	_ = io.read_ptr(r, &project.matrix_count, size_of(project.matrix_count)) or_return
-	n := io.read_ptr(r, raw_data(project.matrices), size_of(f32) * len(project.matrices)) or_return
+	_ = io.read_ptr(r, raw_data(project.matrices), size_of(f32) * int(project.matrix_count) * 9) or_return
+	_ = io.read_ptr(r, &project.grid, size_of(project.grid)) or_return
+	_ = io.read_ptr(r, &project.shapes, size_of(project.shapes)) or_return
 	return nil
 }