31 lines
945 B
GLSL
31 lines
945 B
GLSL
#ifdef GL_ES
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precision lowp float;
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#endif
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varying vec4 v_fragmentColor;
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varying vec2 v_texCoord;
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uniform float u_radianRight;
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uniform float u_radianLeft;
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const vec3 grayScale = vec3(0.298912, 0.586611, 0.114478);
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void main()
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{
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float r = atan(v_texCoord.y - 0.5, v_texCoord.x - 0.5);
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if (((r >= 0.0) && (r < u_radianRight)) || ((r >= -3.1416) && (r < u_radianLeft))) {
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gl_FragColor = v_fragmentColor * texture2D(CC_Texture0, v_texCoord);
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}
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else {
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vec4 color = texture2D(CC_Texture0, v_texCoord);
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float grayScaleColor = dot(color.rgb, grayScale);
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gl_FragColor = vec4(vec3(grayScaleColor * 0.5), color.a);
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}
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/* ラスター.
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float offset = CC_Time.y * 0.5;
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vec2 texCoord = v_texCoord;
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float degX = (((v_texCoord.y+offset) * 2.0) - 1.0) * 360.0;
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float radX = radians(degX);
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texCoord.x += (sin(radX) * 0.0625);
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gl_FragColor = v_fragmentColor * texture2D(CC_Texture0, texCoord);
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*/
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}
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