mirror of https://github.com/axmolengine/axmol.git
25 lines
742 B
C
25 lines
742 B
C
" \n\
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#ifdef GL_ES \n\
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precision lowp float; \n\
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#endif \n\
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\n\
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varying vec4 v_fragmentColor; \n\
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varying vec2 v_texCoord; \n\
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uniform sampler2D CC_Texture0; \n\
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uniform vec3 v_effectColor; \n\
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\n\
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void main() \n\
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{ \n\
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float dist = texture2D(CC_Texture0, v_texCoord).a; \n\
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//todo:Implementation 'fwidth' for glsl 1.0 \n\
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//float width = fwidth(dist); \n\
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//assign width for constant will lead to a little bit fuzzy,it's temporary measure.\n\
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float width = 0.04; \n\
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float alpha = smoothstep(0.5-width, 0.5+width, dist); \n\
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//glow \n\
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float mu = smoothstep(0.5, 1.0, sqrt(dist)); \n\
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vec3 rgb = v_effectColor*(1.0-alpha) + v_fragmentColor.rgb*alpha; \n\
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gl_FragColor = vec4(rgb, max(alpha,mu)); \n\
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} \n\
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";
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