fgdata/Shaders/3dcloud.frag

#version 120

uniform sampler2D baseTexture;
varying float fogFactor;
varying vec4  cloudColor;

void main(void)
{
      vec4 base = texture2D( baseTexture, gl_TexCoord[0].st);
      if (base.a < 0.02)
        discard;

      vec4 finalColor = base * cloudColor;
      gl_FragColor.rgb = mix(gl_Fog.color.rgb, finalColor.rgb, fogFactor );
      gl_FragColor.a = finalColor.a;
}
Add missing shader version tags for the other shaders too 2016-08-03 07:59:29 +00:00			`#version 120`

From Lauri Peltonen (Zan): These two patches allow use of external shaders as the tree and 3d cloud shaders. The shaders are Shaders/3dcloud.{frag\|vert} and Shaders/tree.{frag\|vert}. If the shader files are not found, the original shaders included in the source are used. This makes testing modifications to the shaders easier and faster. End users should see no difference when using this. 2009-09-29 07:41:11 +00:00			`uniform sampler2D baseTexture;`
			`varying float fogFactor;`
Fix for black clouds on ATI (bug 1160) http://code.google.com/p/flightgear-bugs/issues/detail?id=1160 Fix by Emilian Huminiuc. 2013-12-25 23:14:04 +00:00			`varying vec4 cloudColor;`
From Lauri Peltonen (Zan): These two patches allow use of external shaders as the tree and 3d cloud shaders. The shaders are Shaders/3dcloud.{frag\|vert} and Shaders/tree.{frag\|vert}. If the shader files are not found, the original shaders included in the source are used. This makes testing modifications to the shaders easier and faster. End users should see no difference when using this. 2009-09-29 07:41:11 +00:00
			`void main(void)`
			`{`
			`vec4 base = texture2D( baseTexture, gl_TexCoord[0].st);`
Discard cloud fragments with a transparency >98% 2012-12-16 22:16:16 +00:00			`if (base.a < 0.02)`
Increase opacity of clouds, discard transparent fragments. 2012-12-05 21:37:16 +00:00			`discard;`

Fix for black clouds on ATI (bug 1160) http://code.google.com/p/flightgear-bugs/issues/detail?id=1160 Fix by Emilian Huminiuc. 2013-12-25 23:14:04 +00:00			`vec4 finalColor = base * cloudColor;`
From Lauri Peltonen (Zan): These two patches allow use of external shaders as the tree and 3d cloud shaders. The shaders are Shaders/3dcloud.{frag\|vert} and Shaders/tree.{frag\|vert}. If the shader files are not found, the original shaders included in the source are used. This makes testing modifications to the shaders easier and faster. End users should see no difference when using this. 2009-09-29 07:41:11 +00:00			`gl_FragColor.rgb = mix(gl_Fog.color.rgb, finalColor.rgb, fogFactor );`
Updated shaders and effects for 3D clouds using single Drawable per cloud rather than per sprite. 2012-01-17 22:19:53 +00:00			`gl_FragColor.a = finalColor.a;`
From Lauri Peltonen (Zan): These two patches allow use of external shaders as the tree and 3d cloud shaders. The shaders are Shaders/3dcloud.{frag\|vert} and Shaders/tree.{frag\|vert}. If the shader files are not found, the original shaders included in the source are used. This makes testing modifications to the shaders easier and faster. End users should see no difference when using this. 2009-09-29 07:41:11 +00:00			`}`