Shaders rework.

3 files changed, 167 insertions, 0 deletions

diff --git a/client/shaders/alpha_shader/base.txt b/client/shaders/alpha_shader/base.txt
new file mode 100644
index 000000000..1c2647118
--- /dev/null
+++ b/client/shaders/alpha_shader/base.txt
@@ -0,0 +1 @@
+trans_alphach
diff --git a/client/shaders/alpha_shader/opengl_fragment.glsl b/client/shaders/alpha_shader/opengl_fragment.glsl
new file mode 100644
index 000000000..e72c1b9a6
--- /dev/null
+++ b/client/shaders/alpha_shader/opengl_fragment.glsl
@@ -0,0 +1,67 @@
+#version 120

+

+uniform sampler2D baseTexture;

+uniform sampler2D normalTexture;

+uniform sampler2D useNormalmap;

+

+uniform float enableBumpmapping;

+uniform float enableParallaxOcclusion;

+uniform float parallaxOcclusionScale;

+uniform float parallaxOcclusionBias;

+

+

+uniform vec4 skyBgColor;

+uniform float fogDistance;

+

+varying vec3 vPosition;

+varying vec3 tsEyeVec;

+varying vec3 eyeVec;

+

+const float e = 2.718281828459;

+

+void main (void)

+{

+	float use_normalmap = texture2D(useNormalmap,vec2(1.0,1.0)).r;

+	float enable_bumpmapping = enableBumpmapping;

+

+	vec3 color;

+	vec2 uv = gl_TexCoord[0].st;

+	float height;

+	vec2 tsEye = vec2(tsEyeVec.x,-tsEyeVec.y);

+	

+	if ((enableParallaxOcclusion == 1.0) && (use_normalmap > 0.0)) {

+		float map_height = texture2D(normalTexture, uv).a;

+			if (map_height < 1.0){

+				float height = parallaxOcclusionScale * map_height - parallaxOcclusionBias;

+				uv = uv + height * tsEye;

+			}

+	}

+

+	if ((enable_bumpmapping == 1.0) && (use_normalmap > 0.0)) {

+		vec3 base = texture2D(baseTexture, uv).rgb;

+		vec3 vVec = normalize(eyeVec);

+		vec3 bump = normalize(texture2D(normalTexture, uv).xyz * 2.0 - 1.0);

+		vec3 R = reflect(-vVec, bump);

+		vec3 lVec = normalize(vVec);

+		float diffuse = max(dot(lVec, bump), 0.0);

+		float specular = pow(clamp(dot(R, lVec), 0.0, 1.0),1.0);

+		color = mix (base,diffuse*base,1.0) + 0.1 * specular * diffuse;

+	} else {

+		color = texture2D(baseTexture, uv).rgb;

+	}

+

+	float alpha = texture2D(baseTexture, uv).a;

+	vec4 col = vec4(color.r, color.g, color.b, alpha);

+	col *= gl_Color;

+	col = col * col; // SRGB -> Linear

+	col *= 1.8;

+	col.r = 1.0 - exp(1.0 - col.r) / e;

+	col.g = 1.0 - exp(1.0 - col.g) / e;

+	col.b = 1.0 - exp(1.0 - col.b) / e;

+	col = sqrt(col); // Linear -> SRGB

+	if(fogDistance != 0.0){

+		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));

+		col = mix(col, skyBgColor, d);

+	}

+    gl_FragColor = vec4(col.r, col.g, col.b, alpha);   

+}

diff --git a/client/shaders/alpha_shader/opengl_vertex.glsl b/client/shaders/alpha_shader/opengl_vertex.glsl
new file mode 100644
index 000000000..c26fdd3d5
--- /dev/null
+++ b/client/shaders/alpha_shader/opengl_vertex.glsl
@@ -0,0 +1,99 @@
+#version 120

+

+uniform mat4 mWorldViewProj;

+uniform mat4 mInvWorld;

+uniform mat4 mTransWorld;

+uniform float dayNightRatio;

+

+uniform vec3 eyePosition;

+

+varying vec3 vPosition;

+varying vec3 eyeVec;

+varying vec3 tsEyeVec;

+

+void main(void)

+{

+	gl_Position = mWorldViewProj * gl_Vertex;

+	vPosition = (mWorldViewProj * gl_Vertex).xyz;

+

+	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);

+

+	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;

+	tsEyeVec = normalize(eyeVec * tbnMatrix);

+	

+	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;

+

+}