1 files changed, 33 insertions, 0 deletions
diff --git a/data/simple.vert b/data/simple.vert
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+++ b/data/simple.vert
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+#version 130
+#extension GL_ARB_explicit_attrib_location: require
+
+uniform mat4 mvp;
+uniform mat3 mv_normal;
+
+layout(location = 0) in vec2 uv;
+
+out vec4 color;
+out vec2 frag_uv;
+
+// Direction of the normal in camera-space.
+out vec3 normal_cs;
+
+void main(void)
+{
+	/* Center the region at the origin.  Assume that it's 7 units by 7
+	 * units.
+	 */
+	vec2 bias_uv = uv - 0.5;
+	vec4 position = vec4(bias_uv.x * 7.,
+			     0.0,
+			     bias_uv.y * 7.,
+			     1.0);
+	gl_Position = mvp * position;
+
+	/* Transform the normal by the inverse-transpose of the model-view
+	 * matrix.
+	 */
+	normal_cs = mv_normal * vec3(0., 1., 0.);
+
+	frag_uv = uv;
+}