31 lines
627 B
GLSL
31 lines
627 B
GLSL
#ifdef GL_ES
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precision mediump float;
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precision mediump int;
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#endif
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// Input :
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uniform sampler2D EW_texID;
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uniform float EW_SoftEdgeMin;
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uniform float EW_SoftEdgeMax;
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uniform int EW_SoftEdge;
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varying vec2 f_texcoord;
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varying vec4 f_color;
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void main(void) {
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vec4 color = texture2D(EW_texID, f_texcoord );
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float dist = color.r;
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#ifndef GL_ES
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float width = fwidth(dist);
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#else
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// float width = abs(dFdx(dist)) + abs(dFdy(dist))
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float width = dist;
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#endif
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float alpha = smoothstep(0.5-width, 0.5+width, dist);
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// Smooth
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gl_FragColor = vec4(f_color[0], f_color[1], f_color[2], f_color[3]*alpha);
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}
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