1 files changed, 35 insertions, 0 deletions
diff --git a/source/blender/draw/modes/shaders/object_particle_dot_vert.glsl b/source/blender/draw/modes/shaders/object_particle_dot_vert.glsl
new file mode 100644
index 00000000000..6dfc212a776
--- /dev/null
+++ b/source/blender/draw/modes/shaders/object_particle_dot_vert.glsl
@@ -0,0 +1,35 @@
+
+uniform mat4 ModelViewMatrix;
+uniform mat4 ProjectionMatrix;
+uniform float pixel_size;
+uniform float size;
+
+in vec3 pos;
+in float val;
+
+out vec4 radii;
+flat out float finalVal;
+
+void main() {
+	gl_Position = ModelViewMatrix * vec4(pos, 1.0);
+
+	float psize = (ProjectionMatrix[3][3] == 0.0) ? (size / (-gl_Position.z * pixel_size)) : (size / pixel_size);
+
+	gl_PointSize = psize;
+
+	// calculate concentric radii in pixels
+	float radius = 0.5 * psize;
+
+	// start at the outside and progress toward the center
+	radii[0] = radius;
+	radii[1] = radius - 1.0;
+	radii[2] = radius - 1.0;
+	radii[3] = radius - 2.0;
+
+	// convert to PointCoord units
+	radii /= psize;
+
+	gl_Position = ProjectionMatrix * gl_Position;
+
+	finalVal = val;
+}