From fbd33b6f3211150cdb14da4afc37f99668a44a14 Mon Sep 17 00:00:00 2001 From: Travis CI Date: Sat, 14 Mar 2015 20:38:11 +0000 Subject: Gem osx/i386 built '' for osx/i386 --- Gem/examples/10.glsl/normal.frag | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Gem/examples/10.glsl/normal.frag (limited to 'Gem/examples/10.glsl/normal.frag') diff --git a/Gem/examples/10.glsl/normal.frag b/Gem/examples/10.glsl/normal.frag new file mode 100644 index 0000000..eef7f86 --- /dev/null +++ b/Gem/examples/10.glsl/normal.frag @@ -0,0 +1,37 @@ +// Cyrille Henry 2008 +#extension GL_ARB_texture_rectangle : enable + +uniform sampler2DRect texture_mass; +varying vec2 coord; + +vec2 test1(vec2 V) +{ + return(max(min(V,vec2(91.,63.)),vec2(0.))); +} + +void main (void) +{ + vec4 color = vec4(1.,0.,0.,1.); + + if ( (coord.x < 91.) && (coord.y < 63.) ) + { + vec4 posG = texture2DRect(texture_mass, test1(coord+vec2(-1., 0.))) ; + vec4 posD = texture2DRect(texture_mass, test1(coord+vec2( 1., 0.))) ; + vec4 posH = texture2DRect(texture_mass, test1(coord+vec2( 0.,-1.))) ; + vec4 posB = texture2DRect(texture_mass, test1(coord+vec2( 0., 1.))) ; + + vec3 normal = cross((posG.xyz-posD.xyz),(posH.xyz-posB.xyz)); + color.xyz = normalize(normal); + color.xyz = normal; + + vec3 DX = posG.xyz-posD.xyz; + vec3 DY = posH.xyz-posB.xyz; + + color += vec4(1.); + color *= 0.5; + + } + color.a = 1.; + gl_FragColor = color; + +} -- cgit v1.2.1