1 files changed, 34 insertions, 0 deletions
diff --git a/source/blender/draw/modes/shaders/object_mball_handles_vert.glsl b/source/blender/draw/modes/shaders/object_mball_handles_vert.glsl
new file mode 100644
index 00000000000..baa3ecb804c
--- /dev/null
+++ b/source/blender/draw/modes/shaders/object_mball_handles_vert.glsl
@@ -0,0 +1,34 @@
+
+/* This shader takes a 2D shape, puts it in 3D Object space such that is stays aligned with view,
+ * and scales the shape according to per-instance attributes
+ * Note that if the stiffness is zero, it assumes the scale is directly multiplied by the radius */
+
+
+uniform mat4 ViewProjectionMatrix;
+uniform vec3 screen_vecs[2];
+
+/* ---- Instanciated Attribs ---- */
+in vec2 pos;
+
+/* ---- Per instance Attribs ---- */
+in mat3x4 ScaleTranslationMatrix;
+in float radius;
+in vec3 color;
+
+flat out vec4 finalColor;
+
+void main()
+{
+	mat3 Scamat = mat3(ScaleTranslationMatrix);
+	vec4 world_pos = vec4(
+		ScaleTranslationMatrix[0][3],
+		ScaleTranslationMatrix[1][3],
+		ScaleTranslationMatrix[2][3],
+		1.0);
+
+	vec3 screen_pos = screen_vecs[0].xyz * pos.x + screen_vecs[1].xyz * pos.y;
+	world_pos.xyz += Scamat * (screen_pos * radius);
+
+	gl_Position = ViewProjectionMatrix * world_pos;
+	finalColor = vec4(color, 1.0);
+}