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[drape] review fixes

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ExMix 2015-07-02 14:26:48 +03:00 • committed by r.kuznetsov
parent 9accf73585
commit 62898700eb
1 changed files with 3 additions and 1 deletions
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4
drape/shaders/line_fragment_shader.fsh
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@ -4,12 +4,14 @@ varying vec2 v_halfLength;
uniform sampler2D u_colorTex;
uniform float u_opacity;
const float aaPixelsCount = 2.0;
void main(void)
{
vec4 color = texture2D(u_colorTex, v_colorTexCoord);
color.a *= u_opacity;
float currentW = abs(v_halfLength.x);
float diff = v_halfLength.y - currentW;
color.a *= mix(0.3, 1.0, clamp(diff / 2.0, 0.0, 1.0));
color.a *= mix(0.3, 1.0, clamp(diff / aaPixelsCount, 0.0, 1.0));
gl_FragColor = color;
}