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69 lines
2.2 KiB
JavaScript
69 lines
2.2 KiB
JavaScript
//This file is automatically rebuilt by the Cesium build process.
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export default "#ifdef GL_OES_standard_derivatives\n\
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#extension GL_OES_standard_derivatives : enable\n\
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#endif\n\
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\n\
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uniform vec4 color;\n\
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\n\
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float getPointOnLine(vec2 p0, vec2 p1, float x)\n\
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{\n\
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float slope = (p0.y - p1.y) / (p0.x - p1.x);\n\
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return slope * (x - p0.x) + p0.y;\n\
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}\n\
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\n\
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czm_material czm_getMaterial(czm_materialInput materialInput)\n\
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{\n\
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czm_material material = czm_getDefaultMaterial(materialInput);\n\
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\n\
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vec2 st = materialInput.st;\n\
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\n\
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#ifdef GL_OES_standard_derivatives\n\
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float base = 1.0 - abs(fwidth(st.s)) * 10.0 * czm_pixelRatio;\n\
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#else\n\
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float base = 0.975; // 2.5% of the line will be the arrow head\n\
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#endif\n\
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\n\
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vec2 center = vec2(1.0, 0.5);\n\
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float ptOnUpperLine = getPointOnLine(vec2(base, 1.0), center, st.s);\n\
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float ptOnLowerLine = getPointOnLine(vec2(base, 0.0), center, st.s);\n\
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\n\
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float halfWidth = 0.15;\n\
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float s = step(0.5 - halfWidth, st.t);\n\
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s *= 1.0 - step(0.5 + halfWidth, st.t);\n\
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s *= 1.0 - step(base, st.s);\n\
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\n\
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float t = step(base, materialInput.st.s);\n\
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t *= 1.0 - step(ptOnUpperLine, st.t);\n\
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t *= step(ptOnLowerLine, st.t);\n\
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\n\
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// Find the distance from the closest separator (region between two colors)\n\
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float dist;\n\
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if (st.s < base)\n\
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{\n\
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float d1 = abs(st.t - (0.5 - halfWidth));\n\
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float d2 = abs(st.t - (0.5 + halfWidth));\n\
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dist = min(d1, d2);\n\
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}\n\
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else\n\
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{\n\
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float d1 = czm_infinity;\n\
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if (st.t < 0.5 - halfWidth && st.t > 0.5 + halfWidth)\n\
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{\n\
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d1 = abs(st.s - base);\n\
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}\n\
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float d2 = abs(st.t - ptOnUpperLine);\n\
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float d3 = abs(st.t - ptOnLowerLine);\n\
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dist = min(min(d1, d2), d3);\n\
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}\n\
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\n\
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vec4 outsideColor = vec4(0.0);\n\
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vec4 currentColor = mix(outsideColor, color, clamp(s + t, 0.0, 1.0));\n\
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vec4 outColor = czm_antialias(outsideColor, color, currentColor, dist);\n\
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\n\
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outColor = czm_gammaCorrect(outColor);\n\
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material.diffuse = outColor.rgb;\n\
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material.alpha = outColor.a;\n\
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return material;\n\
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}\n\
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";
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