1 files changed, 21 insertions, 0 deletions
diff --git a/data/shaders/outline.vert b/data/shaders/outline.vert
new file mode 100644
index 0000000..07626af
--- /dev/null
+++ b/data/shaders/outline.vert
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: CC-BY-SA-4.0
+#version 330 core
+#pragma variant[0] WORLD_CURVATURE
+
+layout(location = 0) in vec3 vert_Position;
+
+uniform mat4x4 u_ViewProjMatrix;
+uniform vec3 u_WorldPosition;
+uniform float u_ViewDistance;
+uniform vec3 u_Scale;
+
+void main(void)
+{
+    gl_Position = u_ViewProjMatrix * vec4((u_WorldPosition + u_Scale * vert_Position), 1.0);
+    gl_Position.z -= 0.00025;
+
+#if WORLD_CURVATURE
+    gl_Position.y -= gl_Position.z * gl_Position.z / u_ViewDistance / 32.0;
+    gl_Position.y -= gl_Position.x * gl_Position.x / u_ViewDistance / 32.0;
+#endif
+}