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88 lines
3.6 KiB
JavaScript
88 lines
3.6 KiB
JavaScript
//This file is automatically rebuilt by the Cesium build process.
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export default "attribute vec3 startEllipsoidNormal;\n\
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attribute vec3 endEllipsoidNormal;\n\
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attribute vec4 startPositionAndHeight;\n\
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attribute vec4 endPositionAndHeight;\n\
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attribute vec4 startFaceNormalAndVertexCorner;\n\
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attribute vec4 endFaceNormalAndHalfWidth;\n\
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attribute float a_batchId;\n\
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\n\
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uniform mat4 u_modifiedModelView;\n\
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uniform vec2 u_minimumMaximumVectorHeights;\n\
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\n\
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varying vec4 v_startPlaneEC;\n\
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varying vec4 v_endPlaneEC;\n\
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varying vec4 v_rightPlaneEC;\n\
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varying float v_halfWidth;\n\
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varying vec3 v_volumeUpEC;\n\
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\n\
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void main()\n\
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{\n\
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// vertex corner IDs\n\
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// 3-----------7\n\
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// /| left /|\n\
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// / | 1 / |\n\
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// 2-----------6 5 end\n\
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// | / | /\n\
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// start |/ right |/\n\
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// 0-----------4\n\
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//\n\
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float isEnd = floor(startFaceNormalAndVertexCorner.w * 0.251); // 0 for front, 1 for end\n\
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float isTop = floor(startFaceNormalAndVertexCorner.w * mix(0.51, 0.19, isEnd)); // 0 for bottom, 1 for top\n\
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\n\
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vec3 forward = endPositionAndHeight.xyz - startPositionAndHeight.xyz;\n\
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vec3 right = normalize(cross(forward, startEllipsoidNormal));\n\
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\n\
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vec4 position = vec4(startPositionAndHeight.xyz, 1.0);\n\
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position.xyz += forward * isEnd;\n\
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\n\
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v_volumeUpEC = czm_normal * normalize(cross(right, forward));\n\
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\n\
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// Push for volume height\n\
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float offset;\n\
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vec3 ellipsoidNormal = mix(startEllipsoidNormal, endEllipsoidNormal, isEnd);\n\
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\n\
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// offset height to create volume\n\
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offset = mix(startPositionAndHeight.w, endPositionAndHeight.w, isEnd);\n\
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offset = mix(u_minimumMaximumVectorHeights.y, u_minimumMaximumVectorHeights.x, isTop) - offset;\n\
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position.xyz += offset * ellipsoidNormal;\n\
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\n\
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// move from RTC to EC\n\
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position = u_modifiedModelView * position;\n\
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right = czm_normal * right;\n\
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\n\
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// Push for width in a direction that is in the start or end plane and in a plane with right\n\
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// N = normalEC (\"right-facing\" direction for push)\n\
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// R = right\n\
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// p = angle between N and R\n\
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// w = distance to push along R if R == N\n\
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// d = distance to push along N\n\
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//\n\
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// N R\n\
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// { \ p| } * cos(p) = dot(N, R) = w / d\n\
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// d\ \ | |w * d = w / dot(N, R)\n\
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// { \| }\n\
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// o---------- polyline segment ---->\n\
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//\n\
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vec3 scratchNormal = mix(-startFaceNormalAndVertexCorner.xyz, endFaceNormalAndHalfWidth.xyz, isEnd);\n\
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scratchNormal = cross(scratchNormal, mix(startEllipsoidNormal, endEllipsoidNormal, isEnd));\n\
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vec3 miterPushNormal = czm_normal * normalize(scratchNormal);\n\
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\n\
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offset = 2.0 * endFaceNormalAndHalfWidth.w * max(0.0, czm_metersPerPixel(position)); // offset = widthEC\n\
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offset = offset / dot(miterPushNormal, right);\n\
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position.xyz += miterPushNormal * (offset * sign(0.5 - mod(startFaceNormalAndVertexCorner.w, 2.0)));\n\
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\n\
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gl_Position = czm_depthClamp(czm_projection * position);\n\
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\n\
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position = u_modifiedModelView * vec4(startPositionAndHeight.xyz, 1.0);\n\
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vec3 startNormalEC = czm_normal * startFaceNormalAndVertexCorner.xyz;\n\
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v_startPlaneEC = vec4(startNormalEC, -dot(startNormalEC, position.xyz));\n\
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v_rightPlaneEC = vec4(right, -dot(right, position.xyz));\n\
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\n\
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position = u_modifiedModelView * vec4(endPositionAndHeight.xyz, 1.0);\n\
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vec3 endNormalEC = czm_normal * endFaceNormalAndHalfWidth.xyz;\n\
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v_endPlaneEC = vec4(endNormalEC, -dot(endNormalEC, position.xyz));\n\
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v_halfWidth = endFaceNormalAndHalfWidth.w;\n\
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}\n\
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";
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