From: John Tsiombikas <nuclear@member.fsf.org>
Date: Sun, 18 Mar 2018 12:47:08 +0000 (+0200)
Subject: forgot to add the new shader
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=laserbrain_demo;a=commitdiff_plain;h=405378c467bd3b73532bb6a0ea45ff6bf712f539

forgot to add the new shader
---

diff --git a/sdr/lightmap.p.glsl b/sdr/lightmap.p.glsl
new file mode 100644
index 0000000..37b2abb
--- /dev/null
+++ b/sdr/lightmap.p.glsl
@@ -0,0 +1,32 @@
+/* vi: set ft=glsl */
+#ifdef USE_TEXMAP
+uniform sampler2D texmap;
+#endif
+uniform sampler2D lightmap;
+#ifdef USE_MIRROR
+uniform sampler2D mirrortex;
+uniform vec2 mirtex_scale;
+uniform float reflectivity;
+#endif
+
+void main()
+{
+	vec3 lumel = texture2D(lightmap, gl_TexCoord[1].st).rgb;
+
+#ifdef USE_TEXMAP
+	vec3 texel = texture2D(texmap, gl_TexCoord[0].st).rgb;
+	vec3 ambient = gl_LightModel.ambient.rgb * texel;
+	vec3 diffuse = lumel * texel * 1.8;
+#else
+	vec3 ambient = gl_LightModel.ambient.rgb * gl_FrontMaterial.diffuse.rgb;
+	vec3 diffuse = gl_FrontMaterial.diffuse.rgb * lumel * 1.8;
+#endif
+
+#ifdef USE_MIRROR
+	vec3 refl = texture2D(mirrortex, gl_FragCoord.xy * mirtex_scale).rgb;
+	diffuse += refl * reflectivity;	// just add it to diffuse until we get another source of specularity
+#endif
+
+	gl_FragColor.rgb = ambient + diffuse;
+	gl_FragColor.a = gl_FrontMaterial.diffuse.a;
+}