@deck.gl/experimental-layers/dist/esm/advanced-text-layer/advanced-text-layer-vertex.glsl.js

Experimental layers for deck.gl

// Copyright (c) 2015 - 2017 Uber Technologies, Inc.
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export default "#define SHADER_NAME advanced-text-layer-vertex-shader\n\nattribute vec2 positions;\n\nattribute vec3 instancePositions;\nattribute vec2 instancePositions64xyLow;\nattribute float instanceSizes;\nattribute float instanceAngles;\nattribute vec4 instanceColors;\nattribute vec3 instancePickingColors;\nattribute vec4 instanceIconFrames;\nattribute float instanceColorModes;\nattribute vec2 instanceOffsets;\n\nuniform float sizeScale;\nuniform vec2 iconsTextureDim;\n\nvarying float vColorMode;\nvarying vec4 vColor;\nvarying vec2 vTextureCoords;\n\nvec2 rotate_by_angle(vec2 vertex, float angle) {\n  float angle_radian = angle * PI / 180.0;\n  float cos_angle = cos(angle_radian);\n  float sin_angle = sin(angle_radian);\n  mat2 rotationMatrix = mat2(cos_angle, -sin_angle, sin_angle, cos_angle);\n  return rotationMatrix * vertex;\n}\n\nvoid main(void) {\n  vec2 iconSize = instanceIconFrames.zw;\n\n  // scale and rotate vertex in \"pixel\" value and convert back to fraction in clipspace\n  vec2 pixelOffset = positions / 2.0 * iconSize + instanceOffsets;\n  pixelOffset = rotate_by_angle(pixelOffset, instanceAngles) * sizeScale * instanceSizes;\n  pixelOffset.y *= -1.0;\n\n  gl_Position = project_position_to_clipspace(instancePositions, instancePositions64xyLow, vec3(0.0));\n  gl_Position += project_pixel_to_clipspace(pixelOffset);\n\n  vTextureCoords = mix(\n    instanceIconFrames.xy,\n    instanceIconFrames.xy + iconSize,\n    (positions.xy + 1.0) / 2.0\n  ) / iconsTextureDim;\n\n  vTextureCoords.y = 1.0 - vTextureCoords.y;\n\n  vColor = instanceColors / 255.;\n\n  vColorMode = instanceColorModes;\n\n  // Set color to be rendered to picking fbo (also used to check for selection highlight).\n  picking_setPickingColor(instancePickingColors);\n}\n";
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