1 files changed, 15 insertions, 0 deletions
diff --git a/src/imports/shapes/shaders/lineargradient.vert b/src/imports/shapes/shaders/lineargradient.vert
new file mode 100644
index 0000000000..eb21b8886b
--- /dev/null
+++ b/src/imports/shapes/shaders/lineargradient.vert
@@ -0,0 +1,15 @@
+attribute vec4 vertexCoord;
+attribute vec4 vertexColor;
+
+uniform mat4 matrix;
+uniform vec2 gradStart;
+uniform vec2 gradEnd;
+
+varying float gradTabIndex;
+
+void main()
+{
+    vec2 gradVec = gradEnd - gradStart;
+    gradTabIndex = dot(gradVec, vertexCoord.xy - gradStart) / (gradVec.x * gradVec.x + gradVec.y * gradVec.y);
+    gl_Position = matrix * vertexCoord;
+}