colors, rotations, and more

modules/Console_Render/rotate.jai

@@ -0,0 +1,33 @@
+// single point rotation
+rotate :: (p: *Vec2s64, center: Vec2s64, angle: s64) {
+    rad := cast(float64)angle * (PI / 180.0);
+
+    // translate to center
+    tx := p.x - center.x;
+    ty := p.y - center.y;
+
+    // apply rotation
+    rx := cast(s64)(tx * cos(rad) - ty * sin(rad));
+    ry := cast(s64)(tx * sin(rad) + ty * cos(rad));
+
+    // translate back
+    p.x = rx + center.x;
+    p.y = ry + center.y;
+}
+
+// rotate n points
+rotate :: (pn: ..*Vec2s64, center: Vec2s64, angle: s64) {
+    for pn {
+        rotate(it, center, angle);
+    }
+}
+
+// rotate 3 points via triangle struct
+rotate :: (t: *Triangle, center: Vec2s64, angle: s64) {
+    rotate(*t.p1, *t.p2, *t.p3, center = center, angle = angle);
+}
+
+// rotate 4 points via quad struct
+rotate :: (q: *Quad, center: Vec2s64, angle: s64) {
+    rotate(*q.p1, *q.p2, *q.p3, *q.p4, center = center, angle = angle);
+}