1 files changed, 87 insertions, 0 deletions
diff --git a/client/shaders/leaves_shader/opengl_vertex.glsl b/client/shaders/leaves_shader/opengl_vertex.glsl
new file mode 100644
index 000000000..8dfb0669e
--- /dev/null
+++ b/client/shaders/leaves_shader/opengl_vertex.glsl
@@ -0,0 +1,87 @@
+#version 120
+
+uniform mat4 mWorldViewProj;
+uniform mat4 mInvWorld;
+uniform mat4 mTransWorld;
+uniform float dayNightRatio;
+uniform float animationTimer;
+
+uniform float enableWavingLeaves;
+uniform vec3 eyePosition;
+
+varying vec3 vPosition;
+varying vec3 eyeVec;
+
+float smoothCurve( float x ) {  
+  return x * x *( 3.0 - 2.0 * x );  
+}  
+float triangleWave( float x ) {  
+  return abs( fract( x + 0.5 ) * 2.0 - 1.0 );  
+}  
+float smoothTriangleWave( float x ) {  
+  return smoothCurve( triangleWave( x ) ) * 2.0 - 1.0;  
+} 
+
+void main(void)
+{
+	gl_TexCoord[0] = gl_MultiTexCoord0;
+	if (enableWavingLeaves == 1.0){	
+		vec4 pos = gl_Vertex;
+		vec4 pos2 = mTransWorld*gl_Vertex;
+		pos.x += (smoothTriangleWave(animationTimer*10.0 + pos2.x * 0.01 + pos2.z * 0.01) * 2.0 - 1.0) * 0.4;
+		pos.y += (smoothTriangleWave(animationTimer*15.0 + pos2.x * -0.01 + pos2.z * -0.01) * 2.0 - 1.0) * 0.2;
+		pos.z += (smoothTriangleWave(animationTimer*10.0 + pos2.x * -0.01 + pos2.z * -0.01) * 2.0 - 1.0) * 0.4;
+		gl_Position = mWorldViewProj * pos;
+	}
+	else 
+		gl_Position = mWorldViewProj * gl_Vertex;
+
+	vPosition = (mWorldViewProj * gl_Vertex).xyz;
+
+	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
+
+	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 * 2.5; // 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 = clamp(rg,0.0,1.0);
+	color.g = clamp(rg,0.0,1.0);
+	color.b = clamp(b,0.0,1.0);
+
+	// 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;
+
+}