Add the skybox shader for harvest. For the moment it's still an object in the transparent pass. The object should be in the skybox pass

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14909 178a84e3-b1eb-0310-8ba1-8eac791a3b58

data/shaders/skybox.frag

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+//  SuperTuxKart - a fun racing game with go-kart
+//  Copyright (C) 2013 the SuperTuxKart team
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 3
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+uniform sampler2D tex;
+uniform sampler2D glow_tex;
+uniform float transparency;
+uniform vec3 sun_pos;
+
+varying vec2 uv_anim;
+varying vec2 uv;
+varying vec2 uv_cl;
+varying vec3 vertex;
+varying vec2 uv_fast;
+
+void main()
+{
+
+  vec3 V = normalize(vertex);
+  vec3 L = normalize(vec3(sun_pos));
+  
+  vec3 col = texture2D(tex, vec2((L.y + 1.0) / 2.0, V.y));
+  
+  float vl = clamp(dot(V, L), 0, 1);
+
+	vec3 paint = texture2D(tex, uv * 3).a;
+	
+	uv += 20;
+	vec3 paint2 = texture2D(tex, uv * 5).a;
+	
+	// Get the general cloud mask
+	
+	
+	float hello = texture2D(glow_tex, (uv_cl + paint2 * 0.07) *2).g;
+	
+	float cld_mask = texture2D(glow_tex, (uv_anim + hello * 0.007 )).r;
+	
+	vec2 fast = vec2(-uv_fast.x, uv_fast.y);// + (hello * 0.007);
+	float cld_fast = texture2D(glow_tex, fast ).r;
+
+
+
+	
+	cld_mask = (cld_mask * hello * 0.5);
+  cld_fast = (cld_fast + hello );
+
+	col = cld_mask + col*(1 - cld_mask);
+	col = cld_fast + col*(1 - cld_fast);
+	
+  gl_FragColor = vec4( (col * paint2 * paint), 1.0);
+  
+
+  //gl_FragColor = vec4(vec3(ou), 1.0);
+}

data/shaders/skybox.vert

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+//  SuperTuxKart - a fun racing game with go-kart
+//  Copyright (C) 2013 the SuperTuxKart team
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 3
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+
+// Creates a bubble (wave) effect by distorting the texture depending on time
+
+uniform float time;
+
+varying vec2 uv;
+varying vec2 uv_anim;
+varying vec2 uv_cl;
+varying vec2 uv_fast;
+
+varying vec3 vertex;
+
+
+void main()
+{
+    gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
+    gl_Position = ftransform();
+
+
+    float delta_x = cos(time*3.0) * sin( 4.0 * gl_TexCoord[0].st.s * 6.28318531 );
+    float delta_y = cos(time*2.0) * sin( 3.0 * gl_TexCoord[0].st.t * 6.28318531 );
+
+    vertex      = gl_Vertex.xyz;
+
+    uv = gl_TexCoord[0].st;
+    
+    
+    uv_anim = gl_TexCoord[0].st + vec2(0.002*time, 0);
+    uv_cl = gl_TexCoord[0].st + vec2(-0.001*time, 0);
+    
+    uv_fast = gl_TexCoord[0].st + vec2(0.005*time, 0);
+}