From 2330267d2207208799ad347ea0d129c0b4551d61 Mon Sep 17 00:00:00 2001
From: RealBadAngel <mk@realbadangel.pl>
Date: Tue, 3 Dec 2013 17:21:40 +0100
Subject: Shaders rework.

---
 client/shaders/liquids_shader/base.txt             |  1 +
 client/shaders/liquids_shader/opengl_fragment.glsl | 53 +++++++++++++++++
 client/shaders/liquids_shader/opengl_vertex.glsl   | 69 ++++++++++++++++++++++
 3 files changed, 123 insertions(+)
 create mode 100644 client/shaders/liquids_shader/base.txt
 create mode 100644 client/shaders/liquids_shader/opengl_fragment.glsl
 create mode 100644 client/shaders/liquids_shader/opengl_vertex.glsl

(limited to 'client/shaders/liquids_shader')

diff --git a/client/shaders/liquids_shader/base.txt b/client/shaders/liquids_shader/base.txt
new file mode 100644
index 000000000..1c2647118
--- /dev/null
+++ b/client/shaders/liquids_shader/base.txt
@@ -0,0 +1 @@
+trans_alphach
diff --git a/client/shaders/liquids_shader/opengl_fragment.glsl b/client/shaders/liquids_shader/opengl_fragment.glsl
new file mode 100644
index 000000000..a5ffd71bb
--- /dev/null
+++ b/client/shaders/liquids_shader/opengl_fragment.glsl
@@ -0,0 +1,53 @@
+#version 120
+
+uniform sampler2D baseTexture;
+uniform sampler2D normalTexture;
+uniform sampler2D useNormalmap;
+
+uniform float enableBumpmapping;
+
+uniform vec4 skyBgColor;
+uniform float fogDistance;
+uniform vec3 eyePosition;
+
+varying vec3 vPosition;
+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;
+
+	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(vec3(-1.0, -0.4, 0.5), 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 = gl_Color.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));
+		alpha = mix(alpha, 0.0, d);
+	}
+    gl_FragColor = vec4(col.r, col.g, col.b, alpha); 
+}
diff --git a/client/shaders/liquids_shader/opengl_vertex.glsl b/client/shaders/liquids_shader/opengl_vertex.glsl
new file mode 100644
index 000000000..8ceb9f2cb
--- /dev/null
+++ b/client/shaders/liquids_shader/opengl_vertex.glsl
@@ -0,0 +1,69 @@
+#version 120
+
+uniform mat4 mWorldViewProj;
+uniform mat4 mInvWorld;
+uniform mat4 mTransWorld;
+uniform float dayNightRatio;
+uniform float animationTimer;
+
+uniform float enableWavingWater;
+uniform float waterWaveLength;
+uniform float waterWaveHeight;
+uniform float waterWaveSpeed;
+
+uniform vec3 eyePosition;
+
+varying vec3 vPosition;
+varying vec3 eyeVec;
+
+void main(void)
+{
+	if (enableWavingWater == 1.0){
+		vec4 pos2 = gl_Vertex;
+		pos2.y -= 2.0;
+		pos2.y -= sin (pos2.z/waterWaveLength + animationTimer * waterWaveSpeed * waterWaveLength) * waterWaveHeight
+			+ sin ((pos2.z/waterWaveLength + animationTimer * waterWaveSpeed * waterWaveLength) / 7.0) * waterWaveHeight;
+		gl_Position = mWorldViewProj * pos2;
+	} else
+		gl_Position = mWorldViewProj * gl_Vertex;
+
+	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
+	vPosition = (mWorldViewProj * 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);
+	color.a = gl_Color.a;
+
+	gl_FrontColor = gl_BackColor = color;
+
+	gl_TexCoord[0] = gl_MultiTexCoord0;
+
+}
-- 
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