Support for the BillboardPainter

Based on the ShadowStenciller, creates flattened images of a model for
simplified mass use in a scene.

1 files changed, 22 insertions, 0 deletions

diff --git a/gfx/gl/shaders/billboardPainter.frag b/gfx/gl/shaders/billboardPainter.frag
new file mode 100644
index 0000000..354f2ab
--- /dev/null
+++ b/gfx/gl/shaders/billboardPainter.frag
@@ -0,0 +1,22 @@
+#version 460 core
+
+layout(binding = 0) uniform sampler2D textureAlbedo;
+layout(location = 0) out vec4 bNormal;
+layout(location = 1) out vec4 bAlbedoSpec;
+
+include(`materialDetail.glsl')
+include(`materialCommon.glsl')
+in vec2 gTexCoords;
+in vec3 gNormal;
+in vec4 gColour;
+flat in MaterialDetail gMaterial;
+
+void
+main()
+{
+	vec4 textureColour = getTextureColour(gMaterial, gTexCoords);
+	float opaque = step(0.5, mix(textureColour.a, 1, gColour.a));
+	bNormal = vec4(gNormal, opaque);
+	gl_FragDepth = mix(1.0, gl_FragCoord.z, opaque);
+	bAlbedoSpec = mix(textureColour, vec4(gColour.rgb, 1), gColour.a);
+}