From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 9 Sep 2012 21:02:36 +0000 (+0300)
Subject: Bring back reflection mapping support to standard shaders
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=f657e545d461948f9d014d65c7546b26671f2828;p=libs%2Fgl.git

Bring back reflection mapping support to standard shaders
---

diff --git a/demos/cubemap.cpp b/demos/cubemap.cpp
index 512f519f..4679590d 100644
--- a/demos/cubemap.cpp
+++ b/demos/cubemap.cpp
@@ -93,6 +93,8 @@ int main()
 	GL::ProgramData shdata;
 	shdata.uniform("environment", 0);
 	shdata.uniform("reflectivity", 0.5f);
+	float env_mat[9] = { 1, 0, 0, 0, 1, 0, 0, 0, 1 };
+	shdata.uniform_matrix3("env_eye_matrix", env_mat);
 
 	GL::MatrixStack::projection() = GL::Matrix::frustum_centered(0.15, 0.1, 0.1, 10);
 
diff --git a/source/programbuilder.cpp b/source/programbuilder.cpp
index 636d87a9..2f38c93c 100644
--- a/source/programbuilder.cpp
+++ b/source/programbuilder.cpp
@@ -19,6 +19,7 @@ Naming conventions:
   eye_*      Eye space
   tbn_*      Tangent-Binormal-Normal space
   shd_*      Shadow space
+  env_*      Environment space
   *_dir      Direction vector
 
   zzz_*      Wildcard space, resolved by the builder
@@ -45,8 +46,10 @@ const ProgramBuilder::StandardVariable ProgramBuilder::standard_variables[] =
 	{ FRAGMENT, "color_base", "vec4", "color", "!l!sm" },
 	{ FRAGMENT, "color_base", "vec4", "vec4(vec3(l_shadow), 1.0)", "!ls!m" },
 	{ FRAGMENT, "color_base", "vec4", "color*vec4(vec3(l_shadow), 1.0)", "!lsm" },
-	{ FRAGMENT, "color_base", "vec4", "vec4(rgb_light_full, 1.0)", "l!m" },
-	{ FRAGMENT, "color_base", "vec4", "vec4(rgb_light_full, gl_FrontMaterial.diffuse.a)", "lm" },
+	{ FRAGMENT, "color_base", "vec4", "vec4(rgb_light_env, 1.0)", "l!m" },
+	{ FRAGMENT, "color_base", "vec4", "vec4(rgb_light_env, gl_FrontMaterial.diffuse.a)", "lm" },
+	{ FRAGMENT, "rgb_light_env", "vec3", "rgb_light_full+reflect_sample.rgb*reflectivity", "e" },
+	{ FRAGMENT, "rgb_light_env", "vec3", "rgb_light_full", "!e" },
 	{ FRAGMENT, "rgb_light_full", "vec3", "rgb_light_shadow+gl_FrontLightModelProduct.sceneColor.rgb", "m" },
 	{ FRAGMENT, "rgb_light_full", "vec3", "rgb_light_shadow", "!m" },
 	{ FRAGMENT, "rgb_light_shadow", "vec3", "rgb_light*l_shadow", "s" },
@@ -55,6 +58,10 @@ const ProgramBuilder::StandardVariable ProgramBuilder::standard_variables[] =
 	{ FRAGMENT, "rgb_light", "vec3", "vec3(l_diffuse+l_specular)", "!mp" },
 	{ FRAGMENT, "rgb_light", "vec3", "l_diffuse*gl_FrontLightProduct[0].diffuse.rgb", "m!p" },
 	{ FRAGMENT, "rgb_light", "vec3", "l_diffuse*gl_FrontLightProduct[0].diffuse.rgb+l_specular*gl_FrontLightProduct[0].specular.rgb", "mp" },
+	{ FRAGMENT, "reflect_sample", "vec4", "textureCube(environment, env_reflect_dir)", 0 },
+	{ FRAGMENT, "env_reflect_dir", "vec3", "env_eye_matrix*eye_reflect_dir", 0 },
+	{ FRAGMENT, "eye_reflect_dir", "vec3", "eye_tbn_matrix*tbn_reflect_dir", "n" },
+	{ FRAGMENT, "zzz_reflect_dir", "vec3", "reflect(zzz_incident_dir, n_zzz_normal)", 0 },
 	{ FRAGMENT, "l_shadow", "float", "mix(1.0, shadow_sample, shadow_darkness)", 0 },
 	{ FRAGMENT, "shadow_sample", "float", "shadow2D(shadow, shd_vertex).r", 0 },
 	{ FRAGMENT, "l_diffuse", "float", "max(dot(n_zzz_normal, n_zzz_light_dir), 0.0)", 0 },
@@ -92,6 +99,9 @@ const ProgramBuilder::StandardVariable ProgramBuilder::standard_variables[] =
 	{ UNIFORM, "shadow", "sampler2DShadow", 0, 0 },
 	{ UNIFORM, "shadow_darkness", "float", 0, 0 },
 	{ UNIFORM, "normalmap", "sampler2D", 0, 0 },
+	{ UNIFORM, "environment", "samplerCube", 0, 0 },
+	{ UNIFORM, "env_eye_matrix", "mat3", 0, 0 },
+	{ UNIFORM, "reflectivity", "float", 0, 0 },
 
 	// Terminator entry
 	{ NO_SCOPE,  0, 0, 0, 0 }