From 3f6f327cb97662eb95e20f62650abcfac6bce3ab Mon Sep 17 00:00:00 2001
From: RealBadAngel <mk@realbadangel.pl>
Date: Thu, 4 Jul 2013 02:36:32 +0200
Subject: Add texture bumpmapping feature.

---
 client/shaders/bumpmaps_solids/opengl_vertex.glsl | 98 +++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 client/shaders/bumpmaps_solids/opengl_vertex.glsl

(limited to 'client/shaders/bumpmaps_solids/opengl_vertex.glsl')

diff --git a/client/shaders/bumpmaps_solids/opengl_vertex.glsl b/client/shaders/bumpmaps_solids/opengl_vertex.glsl
new file mode 100644
index 000000000..99c208bdd
--- /dev/null
+++ b/client/shaders/bumpmaps_solids/opengl_vertex.glsl
@@ -0,0 +1,98 @@
+
+uniform mat4 mWorldViewProj;
+uniform mat4 mInvWorld;
+uniform mat4 mTransWorld;
+uniform float dayNightRatio;
+
+varying vec3 vPosition;
+varying vec3 viewVec;
+
+void main(void)
+{
+	gl_Position = mWorldViewProj * gl_Vertex;
+
+	vPosition = (mWorldViewProj * gl_Vertex).xyz;
+	
+	vec3 tangent; 
+	vec3 binormal; 
+
+	vec3 c1 = cross( gl_Normal, vec3(0.0, 0.0, 1.0) ); 
+	vec3 c2 = cross( gl_Normal, vec3(0.0, 1.0, 0.0) ); 
+
+	if( length(c1)>length(c2) )
+	{
+		tangent = c1;	
+	}
+	else
+	{
+		tangent = c2;	
+	}
+
+	tangent = normalize(tangent);
+
+//binormal = cross(gl_Normal, tangent); 
+//binormal = normalize(binormal);
+
+	vec4 color;
+	//color = vec4(1.0, 1.0, 1.0, 1.0);
+
+	float day = gl_Color.r;
+	float night = gl_Color.g;
+	float light_source = gl_Color.b;
+
+	/*color.r = mix(night, day, dayNightRatio);
+	color.g = color.r;
+	color.b = color.r;*/
+
+	float rg = mix(night, day, dayNightRatio);
+	rg += light_source * 1.5; // Make light sources brighter
+	float b = rg;
+
+	// Moonlight is blue
+	b += (day - night) / 13.0;
+	rg -= (day - night) / 13.0;
+
+	// Emphase blue a bit in darker places
+	// See C++ implementation in mapblock_mesh.cpp finalColorBlend()
+	b += max(0.0, (1.0 - abs(b - 0.13)/0.17) * 0.025);
+
+	// Artificial light is yellow-ish
+	// See C++ implementation in mapblock_mesh.cpp finalColorBlend()
+	rg += max(0.0, (1.0 - abs(rg - 0.85)/0.15) * 0.065);
+
+	color.r = rg;
+	color.g = rg;
+	color.b = b;
+
+	// Make sides and bottom darker than the top
+	color = color * color; // SRGB -> Linear
+	if(gl_Normal.y <= 0.5)
+		color *= 0.6;
+		//color *= 0.7;
+	color = sqrt(color); // Linear -> SRGB
+
+	color.a = gl_Color.a;
+
+	gl_FrontColor = gl_BackColor = color;
+
+	gl_TexCoord[0] = gl_MultiTexCoord0;
+	
+	vec3 n1 = normalize(gl_NormalMatrix * gl_Normal);
+	vec4 tangent1 = vec4(tangent.x, tangent.y, tangent.z, 0);
+	//vec3 t1 = normalize(gl_NormalMatrix * tangent1);
+	//vec3 b1 = cross(n1, t1);
+
+	vec3 v;
+	vec3 vVertex = vec3(gl_ModelViewMatrix * gl_Vertex);
+	vec3 vVec = -vVertex;
+	//v.x = dot(vVec, t1);
+	//v.y = dot(vVec, b1);
+	//v.z = dot(vVec, n1);
+	//viewVec = vVec;
+	viewVec = normalize(vec3(0.0, -0.4, 0.5));
+	//Vector representing the 0th texture coordinate passed to fragment shader
+//gl_TexCoord[0] = vec2(gl_MultiTexCoord0);
+
+// Transform the current vertex
+//gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+}
-- 
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