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Contents
#extension GL_OES_standard_derivatives : enable uniform vec4 color; varying float v_width; float getPointOnLine(vec2 p0, vec2 p1, float x) { float slope = (p0.y - p1.y) / (p0.x - p1.x); return slope * (x - p0.x) + p0.y; } czm_material czm_getMaterial(czm_materialInput materialInput) { czm_material material = czm_getDefaultMaterial(materialInput); vec2 st = materialInput.st; float base = 1.0 - abs(fwidth(st.s)) * 10.0; vec2 center = vec2(1.0, 0.5); float ptOnUpperLine = getPointOnLine(vec2(base, 1.0), center, st.s); float ptOnLowerLine = getPointOnLine(vec2(base, 0.0), center, st.s); float halfWidth = 0.15; float s = step(0.5 - halfWidth, st.t); s *= 1.0 - step(0.5 + halfWidth, st.t); s *= 1.0 - step(base, st.s); float t = step(base, materialInput.st.s); t *= 1.0 - step(ptOnUpperLine, st.t); t *= step(ptOnLowerLine, st.t); // Find the distance from the closest separator (region between two colors) float dist; if (st.s < base) { float d1 = abs(st.t - (0.5 - halfWidth)); float d2 = abs(st.t - (0.5 + halfWidth)); dist = min(d1, d2); } else { float d1 = czm_infinity; if (st.t < 0.5 - halfWidth && st.t > 0.5 + halfWidth) { d1 = abs(st.s - base); } float d2 = abs(st.t - ptOnUpperLine); float d3 = abs(st.t - ptOnLowerLine); dist = min(min(d1, d2), d3); } vec4 outsideColor = vec4(0.0); vec4 currentColor = mix(outsideColor, color, clamp(s + t, 0.0, 1.0)); vec4 outColor = czm_antialias(outsideColor, color, currentColor, dist); material.diffuse = outColor.rgb; material.alpha = outColor.a; return material; }
Version data entries
15 entries across 15 versions & 1 rubygems