1 files changed, 18 insertions, 1 deletions

diff --git a/mainv.glsl b/mainv.glsl
index d78f63d..b26ee6f 100644
--- a/mainv.glsl
+++ b/mainv.glsl
@@ -3,10 +3,27 @@ attribute vec3 v_normal;
 uniform mat4 u_transform;
 uniform vec3 u_offset;
 uniform vec3 u_scale;
+uniform float u_yaw, u_pitch;
 
 varying vec3 normal;
 
 void main() {
-	gl_Position = u_transform * vec4(v_pos * u_scale + u_offset, 1.0);
+	float cy = cos(u_yaw),   sy = sin(u_yaw);
+	float cp = cos(u_pitch), sp = sin(u_pitch);
+	float x = v_pos.x, y = v_pos.y, z = v_pos.z;
+	vec3 pos;
+	pos = vec3(
+		x,
+		cp * y - sp * z,
+		sp * y + cp * z
+	);
+	x = pos.x; y = pos.y; z = pos.z;
+	pos = vec3(
+		+cy * x + sy * z,
+		y,
+		-sy * x + cy * z
+	);
+
+	gl_Position = u_transform * vec4(pos * u_scale + u_offset, 1.0);
 	normal = v_normal;
 }