Shaders: Remove unused water surface shader

Also remove hardcoded MTGame node.

The 'water surface shader' was duplicated shader code in preparation for
intended new water surface shaders. For development purposes the MTGame node
'default:water_source' had it's top tile assigned to 'water surface shader'.
Due to shader duplication this commit does not cause any change to shader
behaviour.

1 files changed, 0 insertions, 137 deletions

diff --git a/client/shaders/water_surface_shader/opengl_vertex.glsl b/client/shaders/water_surface_shader/opengl_vertex.glsl
deleted file mode 100644
index 112db9bb5..000000000
--- a/client/shaders/water_surface_shader/opengl_vertex.glsl
+++ /dev/null
@@ -1,137 +0,0 @@
-uniform mat4 mWorldViewProj;
-uniform mat4 mWorld;
-
-// Color of the light emitted by the sun.
-uniform vec3 dayLight;
-uniform vec3 eyePosition;
-uniform float animationTimer;
-
-varying vec3 vPosition;
-varying vec3 worldPosition;
-
-varying vec3 eyeVec;
-varying vec3 lightVec;
-varying vec3 tsEyeVec;
-varying vec3 tsLightVec;
-
-// Color of the light emitted by the light sources.
-const vec3 artificialLight = vec3(1.04, 1.04, 1.04);
-const float e = 2.718281828459;
-const float BS = 10.0;
-
-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 (MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE) && ENABLE_WAVING_WATER
-	vec4 pos = gl_Vertex;
-	pos.y -= 2.0;
-
-	float posYbuf = (pos.z / WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH);
-
-	pos.y -= sin(posYbuf) * WATER_WAVE_HEIGHT + sin(posYbuf / 7.0) * WATER_WAVE_HEIGHT;
-	gl_Position = mWorldViewProj * pos;
-#elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES && ENABLE_WAVING_LEAVES
-	vec4 pos = gl_Vertex;
-	vec4 pos2 = mWorld * gl_Vertex;
-	/*
-	 * Mathematic optimization: pos2.x * A + pos2.z * A (2 multiplications + 1 addition)
-	 * replaced with: (pos2.x + pos2.z) * A (1 addition + 1 multiplication)
-	 * And bufferize calcul to a float
-	 */
-	float pos2XpZ = pos2.x + pos2.z;
-	pos.x += (smoothTriangleWave(animationTimer*10.0 + pos2XpZ * 0.01) * 2.0 - 1.0) * 0.4;
-	pos.y += (smoothTriangleWave(animationTimer*15.0 + pos2XpZ * -0.01) * 2.0 - 1.0) * 0.2;
-	pos.z += (smoothTriangleWave(animationTimer*10.0 + pos2XpZ * -0.01) * 2.0 - 1.0) * 0.4;
-	gl_Position = mWorldViewProj * pos;
-#elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS && ENABLE_WAVING_PLANTS
-	vec4 pos = gl_Vertex;
-	vec4 pos2 = mWorld * gl_Vertex;
-	if (gl_TexCoord[0].y < 0.05) {
-		/*
-		 * Mathematic optimization: pos2.x * A + pos2.z * A (2 multiplications + 1 addition)
-		 * replaced with: (pos2.x + pos2.z) * A (1 addition + 1 multiplication)
-		 * And bufferize calcul to a float
-		 */
-		float pos2XpZ = pos2.x + pos2.z;
-		pos.x += (smoothTriangleWave(animationTimer * 20.0 + pos2XpZ * 0.1) * 2.0 - 1.0) * 0.8;
-		pos.y -= (smoothTriangleWave(animationTimer * 10.0 + pos2XpZ * -0.5) * 2.0 - 1.0) * 0.4;
-	}
-	gl_Position = mWorldViewProj * pos;
-#else
-	gl_Position = mWorldViewProj * gl_Vertex;
-#endif
-
-	vPosition = gl_Position.xyz;
-	worldPosition = (mWorld * gl_Vertex).xyz;
-	vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
-
-	vec3 normal, tangent, binormal;
-	normal = normalize(gl_NormalMatrix * gl_Normal);
-	if (gl_Normal.x > 0.5) {
-		//  1.0,  0.0,  0.0
-		tangent  = normalize(gl_NormalMatrix * vec3( 0.0,  0.0, -1.0));
-		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));
-	} else if (gl_Normal.x < -0.5) {
-		// -1.0,  0.0,  0.0
-		tangent  = normalize(gl_NormalMatrix * vec3( 0.0,  0.0,  1.0));
-		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));
-	} else if (gl_Normal.y > 0.5) {
-		//  0.0,  1.0,  0.0
-		tangent  = normalize(gl_NormalMatrix * vec3( 1.0,  0.0,  0.0));
-		binormal = normalize(gl_NormalMatrix * vec3( 0.0,  0.0,  1.0));
-	} else if (gl_Normal.y < -0.5) {
-		//  0.0, -1.0,  0.0
-		tangent  = normalize(gl_NormalMatrix * vec3( 1.0,  0.0,  0.0));
-		binormal = normalize(gl_NormalMatrix * vec3( 0.0,  0.0,  1.0));
-	} else if (gl_Normal.z > 0.5) {
-		//  0.0,  0.0,  1.0
-		tangent  = normalize(gl_NormalMatrix * vec3( 1.0,  0.0,  0.0));
-		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));
-	} else if (gl_Normal.z < -0.5) {
-		//  0.0,  0.0, -1.0
-		tangent  = normalize(gl_NormalMatrix * vec3(-1.0,  0.0,  0.0));
-		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));
-	}
-	mat3 tbnMatrix = mat3(tangent.x, binormal.x, normal.x,
-							tangent.y, binormal.y, normal.y,
-							tangent.z, binormal.z, normal.z);
-
-	lightVec = sunPosition - worldPosition;
-	tsLightVec = lightVec * tbnMatrix;
-	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
-	tsEyeVec = eyeVec * tbnMatrix;
-
-	// Calculate color.
-	// Red, green and blue components are pre-multiplied with
-	// the brightness, so now we have to multiply these
-	// colors with the color of the incoming light.
-	// The pre-baked colors are halved to prevent overflow.
-	vec4 color;
-	// The alpha gives the ratio of sunlight in the incoming light.
-	float nightRatio = 1 - gl_Color.a;
-	color.rgb = gl_Color.rgb * (gl_Color.a * dayLight.rgb + 
-		nightRatio * artificialLight.rgb) * 2;
-	color.a = 1;
-	
-	// Emphase blue a bit in darker places
-	// See C++ implementation in mapblock_mesh.cpp finalColorBlend()
-	float brightness = (color.r + color.g + color.b) / 3;
-	color.b += max(0.0, 0.021 - abs(0.2 * brightness - 0.021) +
-		0.07 * brightness);
-	
-	gl_FrontColor = gl_BackColor = clamp(color, 0.0, 1.0);
-}