#ifdef INSTANCED
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attribute vec2 direction;
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#endif
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attribute vec4 positionHighAndScaleX;
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attribute vec4 positionLowAndScaleY;
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attribute vec4 packedAttribute0;
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attribute vec4 packedAttribute1;
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varying vec2 v_offset;
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varying vec3 v_maximumSize;
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varying float v_slice;
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varying float v_brightness;
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void main() {
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// Unpack attributes.
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vec3 positionHigh = positionHighAndScaleX.xyz;
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vec3 positionLow = positionLowAndScaleY.xyz;
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vec2 scale = vec2(positionHighAndScaleX.w, positionLowAndScaleY.w);
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float show = packedAttribute0.x;
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float brightness = packedAttribute0.y;
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vec2 coordinates = packedAttribute0.wz;
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vec3 maximumSize = packedAttribute1.xyz;
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float slice = packedAttribute1.w;
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#ifdef INSTANCED
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vec2 dir = direction;
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#else
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vec2 dir = coordinates;
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#endif
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vec2 offset = dir - vec2(0.5, 0.5);
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vec2 scaledOffset = scale * offset;
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vec4 p = czm_translateRelativeToEye(positionHigh, positionLow);
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vec4 positionEC = czm_modelViewRelativeToEye * p;
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positionEC.xy += scaledOffset;
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positionEC.xyz *= show;
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gl_Position = czm_projection * positionEC;
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v_offset = offset;
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v_maximumSize = maximumSize;
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v_slice = slice;
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v_brightness = brightness;
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}
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