SuperTuxKart 1.5 upstream source (from official release tarball)

data/shaders/utils/get_world_location.vert

@@ -0,0 +1,22 @@
+vec3 rotateVector(vec4 quat, vec3 vec)
+{
+    return vec + 2.0 * cross(cross(vec, quat.xyz) + quat.w * vec, quat.xyz);
+}
+
+vec4 getWorldPosition(vec3 origin, vec4 rotation, vec3 scale, vec3 local_pos)
+{
+    local_pos = local_pos * scale;
+    local_pos = rotateVector(rotation, local_pos);
+    local_pos = local_pos + origin;
+    return vec4(local_pos, 1.0);
+}
+
+vec4 convert10BitVector(vec4 orig)
+{
+    vec4 ret;
+    ret.x = orig.x * 0.00195694715;
+    ret.y = orig.y * 0.00195694715;
+    ret.z = orig.z * 0.00195694715;
+    ret.w = max(orig.w, -1.0);
+    return ret;
+}