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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 | 684x 684x 684x 684x 684x 684x 684x 1x 1x 1x 1x 1x 1x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 731x 1x 731x 731x 731x 731x 731x 731x 731x 74x 74x 731x 74x 74x 74x 74x 74x 74x 731x 731x 74x 74x 74x 657x 1x 823x 823x 1x 1x 671x 671x | import BoundingSphere from "../Core/BoundingSphere.js";
import Cartesian3 from "../Core/Cartesian3.js";
import ComponentDatatype from "../Core/ComponentDatatype.js";
import defined from "../Core/defined.js";
import FeatureDetection from "../Core/FeatureDetection.js";
import Geometry from "../Core/Geometry.js";
import GeometryAttribute from "../Core/GeometryAttribute.js";
import OrthographicFrustum from "../Core/OrthographicFrustum.js";
import PrimitiveType from "../Core/PrimitiveType.js";
import BufferUsage from "../Renderer/BufferUsage.js";
import DrawCommand from "../Renderer/DrawCommand.js";
import Pass from "../Renderer/Pass.js";
import RenderState from "../Renderer/RenderState.js";
import ShaderProgram from "../Renderer/ShaderProgram.js";
import ShaderSource from "../Renderer/ShaderSource.js";
import VertexArray from "../Renderer/VertexArray.js";
import DepthPlaneFS from "../Shaders/DepthPlaneFS.js";
import DepthPlaneVS from "../Shaders/DepthPlaneVS.js";
import SceneMode from "./SceneMode.js";
import Ellipsoid from "../Core/Ellipsoid.js";
/**
* @private
*/
function DepthPlane(depthPlaneEllipsoidOffset) {
this._rs = undefined;
this._sp = undefined;
this._va = undefined;
this._command = undefined;
this._mode = undefined;
this._useLogDepth = false;
this._ellipsoidOffset = depthPlaneEllipsoidOffset ?? 0;
}
const depthQuadScratch = FeatureDetection.supportsTypedArrays()
? new Float32Array(12)
: [];
const scratchCartesian1 = new Cartesian3();
const scratchCartesian2 = new Cartesian3();
const scratchCartesian3 = new Cartesian3();
const scratchCartesian4 = new Cartesian3();
const scratchCartesian5 = new Cartesian3();
function computeDepthQuad(ellipsoid, frameState) {
const radii = ellipsoid.radii;
const camera = frameState.camera;
let center, eastOffset, northOffset;
Iif (camera.frustum instanceof OrthographicFrustum) {
center = Cartesian3.ZERO;
eastOffset = camera.rightWC;
northOffset = camera.upWC;
} else {
const p = camera.positionWC;
// Find the corresponding position in the scaled space of the ellipsoid.
const q = Cartesian3.multiplyComponents(
ellipsoid.oneOverRadii,
p,
scratchCartesian1,
);
const qUnit = Cartesian3.normalize(q, scratchCartesian2);
// Determine the east and north directions at q.
const eUnit = Cartesian3.normalize(
Cartesian3.cross(Cartesian3.UNIT_Z, q, scratchCartesian3),
scratchCartesian3,
);
const nUnit = Cartesian3.normalize(
Cartesian3.cross(qUnit, eUnit, scratchCartesian4),
scratchCartesian4,
);
const qMagnitude = Cartesian3.magnitude(q);
// Determine the radius of the 'limb' of the ellipsoid.
const wMagnitude = Math.sqrt(qMagnitude * qMagnitude - 1.0);
// Compute the center and offsets.
center = Cartesian3.multiplyByScalar(
qUnit,
1.0 / qMagnitude,
scratchCartesian1,
);
const scalar = wMagnitude / qMagnitude;
eastOffset = Cartesian3.multiplyByScalar(eUnit, scalar, scratchCartesian2);
northOffset = Cartesian3.multiplyByScalar(nUnit, scalar, scratchCartesian3);
}
// A conservative measure for the longitudes would be to use the min/max longitudes of the bounding frustum.
const upperLeft = Cartesian3.add(center, northOffset, scratchCartesian5);
Cartesian3.subtract(upperLeft, eastOffset, upperLeft);
Cartesian3.multiplyComponents(radii, upperLeft, upperLeft);
Cartesian3.pack(upperLeft, depthQuadScratch, 0);
const lowerLeft = Cartesian3.subtract(center, northOffset, scratchCartesian5);
Cartesian3.subtract(lowerLeft, eastOffset, lowerLeft);
Cartesian3.multiplyComponents(radii, lowerLeft, lowerLeft);
Cartesian3.pack(lowerLeft, depthQuadScratch, 3);
const upperRight = Cartesian3.add(center, northOffset, scratchCartesian5);
Cartesian3.add(upperRight, eastOffset, upperRight);
Cartesian3.multiplyComponents(radii, upperRight, upperRight);
Cartesian3.pack(upperRight, depthQuadScratch, 6);
const lowerRight = Cartesian3.subtract(
center,
northOffset,
scratchCartesian5,
);
Cartesian3.add(lowerRight, eastOffset, lowerRight);
Cartesian3.multiplyComponents(radii, lowerRight, lowerRight);
Cartesian3.pack(lowerRight, depthQuadScratch, 9);
return depthQuadScratch;
}
DepthPlane.prototype.update = function (frameState) {
this._mode = frameState.mode;
Iif (frameState.mode !== SceneMode.SCENE3D) {
return;
}
const context = frameState.context;
// Allow offsetting the ellipsoid radius to address rendering artifacts below ellipsoid zero elevation.
const radii = frameState.mapProjection.ellipsoid.radii;
const ellipsoid = new Ellipsoid(
radii.x + this._ellipsoidOffset,
radii.y + this._ellipsoidOffset,
radii.z + this._ellipsoidOffset,
);
const useLogDepth = frameState.useLogDepth;
if (!defined(this._command)) {
this._rs = RenderState.fromCache({
// Write depth, not color
cull: {
enabled: true,
},
depthTest: {
enabled: true,
},
colorMask: {
red: false,
green: false,
blue: false,
alpha: false,
},
});
this._command = new DrawCommand({
renderState: this._rs,
boundingVolume: new BoundingSphere(
Cartesian3.ZERO,
ellipsoid.maximumRadius,
),
pass: Pass.OPAQUE,
owner: this,
});
}
if (!defined(this._sp) || this._useLogDepth !== useLogDepth) {
this._useLogDepth = useLogDepth;
const vs = new ShaderSource({
sources: [DepthPlaneVS],
});
const fs = new ShaderSource({
sources: [DepthPlaneFS],
});
Iif (useLogDepth) {
fs.defines.push("LOG_DEPTH");
vs.defines.push("LOG_DEPTH");
}
this._sp = ShaderProgram.replaceCache({
shaderProgram: this._sp,
context: context,
vertexShaderSource: vs,
fragmentShaderSource: fs,
attributeLocations: {
position: 0,
},
});
this._command.shaderProgram = this._sp;
}
// update depth plane
const depthQuad = computeDepthQuad(ellipsoid, frameState);
// depth plane
if (!defined(this._va)) {
const geometry = new Geometry({
attributes: {
position: new GeometryAttribute({
componentDatatype: ComponentDatatype.FLOAT,
componentsPerAttribute: 3,
values: depthQuad,
}),
},
indices: [0, 1, 2, 2, 1, 3],
primitiveType: PrimitiveType.TRIANGLES,
});
this._va = VertexArray.fromGeometry({
context: context,
geometry: geometry,
attributeLocations: {
position: 0,
},
bufferUsage: BufferUsage.DYNAMIC_DRAW,
});
this._command.vertexArray = this._va;
} else {
this._va.getAttribute(0).vertexBuffer.copyFromArrayView(depthQuad);
}
};
DepthPlane.prototype.execute = function (context, passState) {
Eif (this._mode === SceneMode.SCENE3D) {
this._command.execute(context, passState);
}
};
DepthPlane.prototype.isDestroyed = function () {
return false;
};
DepthPlane.prototype.destroy = function () {
this._sp = this._sp && this._sp.destroy();
this._va = this._va && this._va.destroy();
};
export default DepthPlane;
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