Open source Star Ruler 2 source code!

data/shaders/source/prominence_vs.txt

@@ -0,0 +1,43 @@
+uniform vec4 curve[8];
+varying vec2 uv;
+varying vec3 pos, normal;
+
+vec4 bezier(float x) {
+	vec4 lerp_a[7], lerp_b[6];
+	
+	for(int i = 0; i < 7; ++i)
+		lerp_a[i] = mix(curve[i], curve[i+1], x);
+	for(int i = 0; i < 6; ++i)
+		lerp_b[i] = mix(lerp_a[i], lerp_a[i+1], x);
+	for(int i = 0; i < 5; ++i)
+		lerp_a[i] = mix(lerp_b[i], lerp_b[i+1], x);
+	for(int i = 0; i < 4; ++i)
+		lerp_b[i] = mix(lerp_a[i], lerp_a[i+1], x);
+	for(int i = 0; i < 3; ++i)
+		lerp_a[i] = mix(lerp_b[i], lerp_b[i+1], x);
+	for(int i = 0; i < 2; ++i)
+		lerp_b[i] = mix(lerp_a[i], lerp_a[i+1], x);
+		
+	return mix(lerp_b[0], lerp_b[1], x);
+}
+
+//Rotate about z (x is known to be 0)
+vec3 rotate(vec3 pt, float rad) {
+	return vec3(pt.y * -sin(rad), pt.y * cos(rad), pt.z);
+}
+
+void main() {
+	uv = gl_MultiTexCoord0.xy;
+	vec4 offset = bezier(uv.x);
+	
+	vec3 n = gl_Vertex.xyz; n.x = 0.0;
+	n = rotate(vec3(0.0, n.yz), offset.w);
+	normal = normalize(gl_NormalMatrix * n);
+	
+	vec3 vert = offset.xyz + rotate(vec3(0, gl_Vertex.yz), offset.w - 0.135);
+	
+	vec4 postMV = gl_ModelViewMatrix * vec4(vert, gl_Vertex.w);
+	pos = (gl_ModelViewMatrix * offset).xyz;
+	
+	gl_Position = gl_ProjectionMatrix * postMV;
+}