Animation start

animation.odin

@@ -1,6 +1,7 @@
 package main
 
 import rl "libraries/raylib"
+import "core:math/linalg"
 import "core:fmt"
 
 /*
@@ -16,8 +17,17 @@ RectangleCorners :: struct {
 	tl, tr, br, bl: v2,
 }
 
+rectangle_corners_transform :: proc(m: mat3, corners: RectangleCorners) -> RectangleCorners {
+	return {
+		tl = (v3{**corners.tl, 1.0} * m).xy,
+		tr = (v3{**corners.tr, 1.0} * m).xy,
+		br = (v3{**corners.br, 1.0} * m).xy,
+		bl = (v3{**corners.bl, 1.0} * m).xy,
+	}
+}
+
 AnimationData_Rectangle :: struct {
-	origin, middle, previous, next, last: RectangleCorners
+	origin, middle, previous, next, last: RectangleCorners,
 }
 
 draw_transformation_rectangle :: proc(rectangle: RectangleCorners, color: rl.Color) {
@@ -51,6 +61,13 @@ _animation_rectangle_reset :: proc(animation: ^AnimationInterface) {
 	data.previous = data.origin
 }
 
+_animation_rectangle_next_matrix :: proc(animation: ^AnimationInterface, next_matrix: mat3) {
+	data := cast(^AnimationData_Rectangle)animation.data
+	data.previous = data.next
+	data.middle = data.next
+	data.next = rectangle_corners_transform(next_matrix, data.next)
+}
+
 _animation_rectangle_update_last :: proc(animation: ^AnimationInterface, master_matrix: mat3) {
 	data := cast(^AnimationData_Rectangle)animation.data
 	data.last = {
@@ -59,12 +76,16 @@ _animation_rectangle_update_last :: proc(animation: ^AnimationInterface, master_
 		br = (master_matrix * v3{**data.origin.br, 1.0}).xy,
 		bl = (master_matrix * v3{**data.origin.bl, 1.0}).xy,
 	}
-	fmt.println(data.last)
-	fmt.println(data.origin)
 }
 
-_animation_rectangle_update :: proc(animation: ^AnimationInterface, current_matrix: mat3, progress: f32) {
+_animation_rectangle_update :: proc(animation: ^AnimationInterface, animation_progress: f32) {
-
+	data := cast(^AnimationData_Rectangle)animation.data
+	data.middle = {
+		tl = linalg.lerp(data.previous.tl, data.next.tl, animation_progress),
+		tr = linalg.lerp(data.previous.tr, data.next.tr, animation_progress),
+		br = linalg.lerp(data.previous.br, data.next.br, animation_progress),
+		bl = linalg.lerp(data.previous.bl, data.next.bl, animation_progress),
+	}
 }
 
 _animation_rectangle_update_goto_next :: proc(animation: ^AnimationInterface, next_matrix: mat3) {
@@ -76,6 +97,8 @@ animation_create_rectangle :: proc(rectangle: ^AnimationData_Rectangle) -> Anima
 		data = rectangle,
 		reset = _animation_rectangle_reset,
 		update_last = _animation_rectangle_update_last,
+		update = _animation_rectangle_update,
+		next_matrix = _animation_rectangle_next_matrix,
 		draw_idle = _animation_rectangle_draw_idle,
 		draw_active = _animation_rectangle_draw_active,
 	}
@@ -85,6 +108,8 @@ AnimationInterface :: struct {
 	data: rawptr,
 	reset: proc(animation: ^AnimationInterface),
 	update_last: proc(animation: ^AnimationInterface, master_matrix: mat3),
+	update: proc(animation: ^AnimationInterface, animation_progress: f32),
+	next_matrix: proc(animation: ^AnimationInterface, next_matrix: mat3),
 	draw_idle: proc(animation: AnimationInterface),
 	draw_active: proc(animation: AnimationInterface),
 }

main.odin

@@ -5,7 +5,7 @@ import "base:runtime"
 
 WINDOW_WIDTH :: 1280
 WINDOW_HEIGHT :: 720
-WINDOW_FRAMERATE :: 30
+WINDOW_FRAMERATE :: 60
 WINDOW_CAPTION :: "Transformation Visualizer"
 
 init :: proc() {
@@ -40,3 +40,7 @@ should_run :: proc() -> bool {
 	}
 	return true
 }
+
+delta_time_fraction :: proc() -> f32 {
+	return rl.GetFrameTime() / (1.0 / WINDOW_FRAMERATE)
+}

program.odin

@@ -4,6 +4,7 @@ import rl "libraries/raylib"
 import ui "libraries/snths_ui"
 import "core:fmt"
 import "core:math/linalg"
+import "core:math/ease"
 
 RAYGUI_ICON_PLAY :: "#131#"
 RAYGUI_ICON_PAUSE :: "#132#"
@@ -156,6 +157,9 @@ Program :: struct {
 	animations: [AnimationType]AnimationInterface,
 	animation: AnimationInterface,
 	animation_matrix_index: int,
+	animation_matrix_progress: f32,
+	animation_speed: f32,
+	animation_ease: ease.Ease,
 }
 
 AnimationData :: struct {
@@ -230,17 +234,16 @@ program_init :: proc(allocator := context.allocator) {
 		.Rectangle = animation_create_rectangle(&program.animation_data.rectangle)
 	}
 	program.animation = program.animations[.Rectangle]
+	program.animation_speed = 0.02
+	program.animation_ease = .Quadratic_Out
 }
 
 program_get_master_matrix :: proc() -> mat3 {
 	matrices := (cast([^]mat3)raw_data(program.matrix_float_pool))[:program.matrix_count]
 	master_matrix := linalg.identity_matrix(mat3)
-	fmt.println("master matrix: ", master_matrix)
 	#reverse for mat in matrices {
-		fmt.println("master matrix: ", master_matrix, mat)
 		master_matrix *= mat
 	}
-	fmt.println("master matrix: ", master_matrix)
 	return master_matrix
 }
 
@@ -311,6 +314,14 @@ program_update :: proc() {
 	grid_inner_position := rect_get_tl(grid.inner_area)
 	draw_grid(grid.area, {32.0, 32.0}, rl.GRAY)
 
+	if program.animation_state == .Playing {
+		program.animation_matrix_progress += program.animation_speed * delta_time_fraction()
+		if program.animation_matrix_progress >= 1.0 {
+			program.animation_matrix_progress = 1.0;
+		}
+		program.animation.update(&program.animation, ease.ease(program.animation_ease, program.animation_matrix_progress))
+	}
+
 	switch program.animation_state {
 	case .Ready:
 		program.animation.draw_idle(program.animation)
@@ -350,16 +361,12 @@ program_add_translation_matrix :: proc(x, y, z: f32) {
 	value_strings, values := matrix_pool_get_mat3()
 	value_strings[0][0] = '1'
 	values[0] = 1.0
-
-	fmt.bprint(value_strings[2][:], x)
-	values[2] = x
-
-	fmt.bprint(value_strings[5][:], y)
 	value_strings[4][0] = '1'
-
 	values[4] = 1.0
-	values[5] = y
+	fmt.bprint(value_strings[6][:], x)
-
+	values[6] = x
+	fmt.bprint(value_strings[7][:], y)
+	values[7] = y
 	fmt.bprint(value_strings[8][:], z)
 	values[8] = z
 }
@@ -613,14 +620,15 @@ program_render_ui_and_handle_focus :: proc(ctx: ^ui.Context, focus_element_id: u
 				case .StartTransformation:
 					if program.matrix_count > 0 {
 						program.animation_state = .Playing
-						// TOOD (synthas): Reset to initial transformation values
+						program.animation.reset(&program.animation)
+						program.animation.next_matrix(&program.animation, (cast(^mat3)raw_data(program.matrix_float_pool))^)
 					}
 				case .PauseTransformation:
 					program.animation_state = .Paused
 				case .ResumeTransformation:
 					program.animation_state = .Playing
 				case .ResetTransformation:
-					// TODO (synthas): Reset to initial transformation values
+					program.animation.reset(&program.animation)
 				}
 				if data.type in UiButtonRecalculateFinishGroup {
 					program.animation.update_last(&program.animation, program_get_master_matrix())
@@ -692,8 +700,9 @@ ui_mat3 :: proc(mat: []f32, value_strings: []InputFloatField, dimensions: ui.Dim
 	ui.container_begin(dimensions, config, container_data)
 		matrix_input_config := ui.ElementConfiguration {margin = 4.0}
 		matrix_input_dimensions := ui.Dimensions {ui.Size_Percentage(1.0 / 3.0), ui.Size_Percentage(1.0 / 3.0)}
-		#unroll for i in 0..<3 {
+		// column first matrices
 		#unroll for j in 0..<3 {
+			#unroll for i in 0..<3 {
 				data := new(UiElementData_FloatInput, allocator)
 				index := i * 3 + j
 				data^ = {value = &mat[index], value_string = cstring(&value_strings[index][0]), tag = {.UpdateMatrix}}