Grid part 1

utils.odin

@@ -136,3 +136,35 @@ rect_get_br :: proc {
 @(private="file") irect2_get_br :: proc(rect: irect2) -> iv2 {
 	return {rect.x + rect.width, rect.y + rect.height}
 }
+
+rect_get_size :: proc {
+	rect2_get_size,
+	irect2_get_size,
+}
+
+@(private="file") rect2_get_size :: proc(rect: rect2) -> v2 {
+	return {rect.width, rect.height}
+}
+
+@(private="file") irect2_get_size :: proc(rect: irect2) -> iv2 {
+	return {rect.width, rect.height}
+}
+
+/// ## LINEAR ALGEBRA ## ///
+matrix3_translate2 :: proc "contextless" (translation: v2) -> mat3 {
+	return {
+		1.0, 0.0, translation.x,
+		0.0, 1.0, translation.y,
+		0.0, 0.0, 1.0,
+	}
+}
+
+matrix3_transform_v2 :: proc(m: mat3, v: v2) -> v2 {
+	return (m * v3{**v, 1.0}).xy
+}
+
+matrix3_transform_rect2 :: proc(m: mat3, r: rect2) -> rect2 {
+	tl := m * v3{r.x, r.y, 1.0}
+	br := m * v3{r.x + r.width, r.y + r.height, 1.0}
+	return {**tl.xy, **(br - tl).xy}
+}