X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Foccluder.glsl;h=b5d05f09ad25dee7b98563dac8564dd0ff98bb82;hb=HEAD;hp=e46ca02b37ffab672f38e3be13d918ba4e826bf6;hpb=d31b672d002c685d15f01a59c17c99a8d164d13e;p=libs%2Fgl.git

diff --git a/shaderlib/occluder.glsl b/shaderlib/occluder.glsl
index e46ca02b..a4d876ec 100644
--- a/shaderlib/occluder.glsl
+++ b/shaderlib/occluder.glsl
@@ -1,11 +1,51 @@
 import msp_interface;
+
+layout(set=1) uniform AlphaCutoff
+{
+	float alpha_cutoff;
+};
+
+layout(set=1) uniform sampler2D alpha_map;
+
+layout(constant_id=auto) const bool use_alpha_cutoff = false;
+layout(constant_id=auto) const bool use_instancing = false;
+
 #pragma MSP stage(vertex)
+virtual vec4 get_vertex_position()
+{
+	return vertex;
+}
+
+virtual mat4 get_vertex_transform()
+{
+	if(use_instancing)
+		return transpose(mat4(instance_transform[0], instance_transform[1], instance_transform[2], vec4(0.0, 0.0, 0.0, 1.0)));
+	else
+		return world_obj_matrix;
+}
+
+virtual void clipping(vec3 eye_vertex)
+{
+}
+
 void main()
 {
-	gl_Position = projection_matrix*eye_obj_matrix*vertex;
+	vec4 eye_vertex = eye_world_matrix*get_vertex_transform()*get_vertex_position();
+	clipping(eye_vertex.xyz);
+	gl_Position = clip_eye_matrix*eye_vertex;
+	passthrough;
 }
+
 #pragma MSP stage(fragment)
+layout(location=0) out vec4 frag_color;
+
 void main()
 {
-	frag_color = vec4(1.0);
+	if(use_alpha_cutoff)
+	{
+		float alpha = texture(alpha_map, texcoord.xy).a;
+		if(alpha<alpha_cutoff)
+			discard;
+		frag_color = vec4(1.0);
+	}
 }