Win32 Demo - Minor math tests

examples/main.odin

@@ -1,20 +1,4 @@
 #load "basic.odin"
-main :: proc() {
-	a := {4}f32{1}; // {1, 1, 1, 1} broadcasts to all
-	a = swizzle({4}f32{1, 2, 3, 4}, 1, 3, 2, 0);
-
-	for i := 0; i < len(a); i++ {
-		if i > 0 {
-			print_string(", ");
-		}
-
-		print_int(a[i] as int);
-	}
-	print_string("\n");
-
-}
-
-/*
 #load "win32.odin"
 #load "opengl.odin"
 #load "stb_image.odin"
@@ -173,12 +157,6 @@ main :: proc() {
 	}
 	defer destroy_window(^window);
 
-	{
-		v := Vec2{1, 2};
-		c := v * 2;
-	}
-
-
 	prev_time := time_now();
 	running := true;
 	for running {
@@ -215,4 +193,3 @@ main :: proc() {
 		display_window(^window);
 	}
 }
-*/

examples/math.odin

@@ -0,0 +1,18 @@
+type Vec2: {2}f32
+type Vec3: {3}f32
+type Vec4: {4}f32
+type Mat2: {4}f32
+
+
+
+sqrt_f32 :: proc(x: f32) -> f32 #foreign "llvm.sqrt.f32"
+sqrt_f64 :: proc(x: f64) -> f64 #foreign "llvm.sqrt.f64"
+
+vec2_dot :: proc(a, b: Vec2) -> f32 { c := a*b; return c[0] + c[1]; }
+vec3_dot :: proc(a, b: Vec3) -> f32 { c := a*b; return c[0] + c[1] + c[2]; }
+
+lerp :: proc(a, b, t: f32) -> f32 { return a*(1-t) + b*t; }
+
+vec2_mag :: proc(a: Vec2) -> f32 { return sqrt_f32(vec2_dot(a, a)); }
+vec3_mag :: proc(a: Vec3) -> f32 { return sqrt_f32(vec3_dot(a, a)); }
+