605 lines
21 KiB
JavaScript
605 lines
21 KiB
JavaScript
// @ts-check
|
|
|
|
import defined from "../Core/defined.js";
|
|
import Cartesian3 from "../Core/Cartesian3.js";
|
|
import Color from "../Core/Color.js";
|
|
import BufferPolyline from "./BufferPolyline.js";
|
|
import Buffer from "../Renderer/Buffer.js";
|
|
import BufferUsage from "../Renderer/BufferUsage.js";
|
|
import VertexArray from "../Renderer/VertexArray.js";
|
|
import ComponentDatatype from "../Core/ComponentDatatype.js";
|
|
import RenderState from "../Renderer/RenderState.js";
|
|
import BlendingState from "./BlendingState.js";
|
|
import ShaderSource from "../Renderer/ShaderSource.js";
|
|
import ShaderProgram from "../Renderer/ShaderProgram.js";
|
|
import DrawCommand from "../Renderer/DrawCommand.js";
|
|
import Pass from "../Renderer/Pass.js";
|
|
import PrimitiveType from "../Core/PrimitiveType.js";
|
|
import BufferPolylineMaterialVS from "../Shaders/BufferPolylineMaterialVS.js";
|
|
import BufferPolylineMaterialFS from "../Shaders/BufferPolylineMaterialFS.js";
|
|
import EncodedCartesian3 from "../Core/EncodedCartesian3.js";
|
|
import AttributeCompression from "../Core/AttributeCompression.js";
|
|
import IndexDatatype from "../Core/IndexDatatype.js";
|
|
import PolylineCommon from "../Shaders/PolylineCommon.js";
|
|
import BufferPolylineMaterial from "./BufferPolylineMaterial.js";
|
|
import BlendOption from "./BlendOption.js";
|
|
|
|
/** @import FrameState from "./FrameState.js"; */
|
|
/** @import BufferPolylineCollection from "./BufferPolylineCollection.js"; */
|
|
/** @import {TypedArray} from "../Core/globalTypes.js"; */
|
|
|
|
/**
|
|
* TODO(PR#13211): Need 'keyof' syntax to avoid duplicating attribute names.
|
|
* @typedef {'positionHigh' | 'positionLow' | 'prevPositionHigh' | 'prevPositionLow' | 'nextPositionHigh' | 'nextPositionLow' | 'pickColor' | 'showColorWidthAndTexCoord' | 'alpha'} BufferPolylineAttribute
|
|
* @ignore
|
|
*/
|
|
|
|
/**
|
|
* Attribute locations when using 64-bit position precision.
|
|
* @type {Record<BufferPolylineAttribute, number>}
|
|
* @ignore
|
|
*/
|
|
const BufferPolylineAttributeLocationsFloat64 = {
|
|
positionHigh: 0,
|
|
positionLow: 1,
|
|
prevPositionHigh: 2,
|
|
prevPositionLow: 3,
|
|
nextPositionHigh: 4,
|
|
nextPositionLow: 5,
|
|
pickColor: 6,
|
|
showColorWidthAndTexCoord: 7,
|
|
alpha: 8,
|
|
};
|
|
|
|
/**
|
|
* Attribute locations when using <= 32-bit position precision.
|
|
* @type {Record<string, number>}
|
|
* @ignore
|
|
*/
|
|
const BufferPolylineAttributeLocations = {
|
|
position: 0,
|
|
prevPosition: 1,
|
|
nextPosition: 2,
|
|
pickColor: 3,
|
|
showColorWidthAndTexCoord: 4,
|
|
alpha: 5,
|
|
};
|
|
|
|
/**
|
|
* @typedef {object} BufferPolylineRenderContext
|
|
* @property {VertexArray} [vertexArray]
|
|
* @property {Record<string, TypedArray>} [attributeArrays]
|
|
* @property {TypedArray} [indexArray]
|
|
* @property {RenderState} [renderState]
|
|
* @property {ShaderProgram} [shaderProgram]
|
|
* @property {DrawCommand} [command]
|
|
* @property {Function} destroy
|
|
* @ignore
|
|
*/
|
|
|
|
// Scratch variables.
|
|
const polyline = new BufferPolyline();
|
|
const material = new BufferPolylineMaterial();
|
|
const pickColor = new Color();
|
|
const cartesian = new Cartesian3();
|
|
const prevCartesian = new Cartesian3();
|
|
const nextCartesian = new Cartesian3();
|
|
const encodedC = new EncodedCartesian3();
|
|
const encodedP = new EncodedCartesian3();
|
|
const encodedN = new EncodedCartesian3();
|
|
|
|
/**
|
|
* Renders line segments as quads, each composed of two triangles. Writes each
|
|
* vertex twice, extruding the pairs in opposing directions outward.
|
|
*
|
|
* Tips:
|
|
* - # segments in polyline primitive = vertexCount - 1
|
|
* - # segments in collection = vertexCount - primitiveCount
|
|
* - # vertices rendered = vertexCount * 2
|
|
* - # indices = segmentCount * 6
|
|
*
|
|
* 0 - 2 - 4 - 6 - 8
|
|
* | \ | \ | \ | \ | ...
|
|
* 1 - 3 - 5 - 7 - 9
|
|
*
|
|
* @param {BufferPolylineCollection} collection
|
|
* @param {FrameState} frameState
|
|
* @param {BufferPolylineRenderContext} [renderContext]
|
|
* @returns {BufferPolylineRenderContext}
|
|
* @ignore
|
|
*/
|
|
function renderBufferPolylineCollection(collection, frameState, renderContext) {
|
|
const context = frameState.context;
|
|
renderContext = renderContext || { destroy: destroyRenderContext };
|
|
const useFloat64 = collection._positionDatatype === ComponentDatatype.DOUBLE;
|
|
const attributeLocations = useFloat64
|
|
? BufferPolylineAttributeLocationsFloat64
|
|
: BufferPolylineAttributeLocations;
|
|
|
|
if (
|
|
!defined(renderContext.attributeArrays) ||
|
|
!defined(renderContext.indexArray)
|
|
) {
|
|
// Number of primitives can only increase, which _decreases_ remaining
|
|
// segment capacity: use `primitiveCount` here, not `primitiveCountMax`.
|
|
const segmentCountMax =
|
|
collection.vertexCountMax - collection.primitiveCount;
|
|
const vertexCountMax = collection.vertexCountMax * 2;
|
|
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/issues/13420
|
|
renderContext.indexArray = IndexDatatype.createTypedArray(
|
|
vertexCountMax,
|
|
segmentCountMax * 6,
|
|
);
|
|
|
|
renderContext.attributeArrays = {
|
|
...(!useFloat64
|
|
? {
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/issues/13420
|
|
position: ComponentDatatype.createTypedArray(
|
|
collection._positionDatatype,
|
|
vertexCountMax * 3,
|
|
),
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/issues/13420
|
|
prevPosition: ComponentDatatype.createTypedArray(
|
|
collection._positionDatatype,
|
|
vertexCountMax * 3,
|
|
),
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/issues/13420
|
|
nextPosition: ComponentDatatype.createTypedArray(
|
|
collection._positionDatatype,
|
|
vertexCountMax * 3,
|
|
),
|
|
}
|
|
: {
|
|
positionHigh: new Float32Array(vertexCountMax * 3),
|
|
positionLow: new Float32Array(vertexCountMax * 3),
|
|
prevPositionHigh: new Float32Array(vertexCountMax * 3),
|
|
prevPositionLow: new Float32Array(vertexCountMax * 3),
|
|
nextPositionHigh: new Float32Array(vertexCountMax * 3),
|
|
nextPositionLow: new Float32Array(vertexCountMax * 3),
|
|
}),
|
|
pickColor: new Uint8Array(vertexCountMax * 4),
|
|
showColorWidthAndTexCoord: new Float32Array(vertexCountMax * 4),
|
|
alpha: new Uint8Array(vertexCountMax),
|
|
};
|
|
}
|
|
|
|
if (collection._dirtyCount > 0) {
|
|
const { _dirtyOffset, _dirtyCount } = collection;
|
|
|
|
const indexArray = renderContext.indexArray;
|
|
|
|
const {
|
|
// Common.
|
|
pickColor: pickColorArray,
|
|
showColorWidthAndTexCoord: showColorWidthAndTexCoordArray,
|
|
alpha: alphaArray,
|
|
|
|
// 8-32 bit.
|
|
position,
|
|
prevPosition,
|
|
nextPosition,
|
|
|
|
// 64 bit.
|
|
positionHigh,
|
|
positionLow,
|
|
prevPositionHigh,
|
|
prevPositionLow,
|
|
nextPositionHigh,
|
|
nextPositionLow,
|
|
} = renderContext.attributeArrays;
|
|
|
|
for (let i = _dirtyOffset, il = _dirtyOffset + _dirtyCount; i < il; i++) {
|
|
collection.get(i, polyline);
|
|
|
|
if (!polyline._dirty) {
|
|
continue;
|
|
}
|
|
|
|
polyline.getMaterial(material);
|
|
const encodedColor = AttributeCompression.encodeRGB8(material.color);
|
|
const colorAlpha = material.color.alpha;
|
|
Color.fromRgba(polyline._pickId, pickColor);
|
|
const show = polyline.show;
|
|
|
|
let vOffset = polyline.vertexOffset * 2; // vertex offset
|
|
let iOffset = (polyline.vertexOffset - i) * 6; // index offset
|
|
|
|
const posView = collection._positionView;
|
|
const posStart = polyline.vertexOffset * 3;
|
|
|
|
for (let j = 0, jl = polyline.vertexCount; j < jl; j++) {
|
|
const isFirstSegment = j === 0;
|
|
const isLastSegment = j === jl - 1;
|
|
|
|
// c=current, p=previous, n=next
|
|
|
|
const cx = posView[posStart + j * 3];
|
|
const cy = posView[posStart + j * 3 + 1];
|
|
const cz = posView[posStart + j * 3 + 2];
|
|
|
|
let px, py, pz, nx, ny, nz;
|
|
|
|
if (isFirstSegment) {
|
|
nx = posView[posStart + 1 * 3];
|
|
ny = posView[posStart + 1 * 3 + 1];
|
|
nz = posView[posStart + 1 * 3 + 2];
|
|
// Mirror current over next to get synthetic prev.
|
|
px = 2 * cx - nx;
|
|
py = 2 * cy - ny;
|
|
pz = 2 * cz - nz;
|
|
} else if (isLastSegment) {
|
|
px = posView[posStart + (j - 1) * 3];
|
|
py = posView[posStart + (j - 1) * 3 + 1];
|
|
pz = posView[posStart + (j - 1) * 3 + 2];
|
|
// Mirror current over prev to get synthetic next.
|
|
nx = 2 * cx - px;
|
|
ny = 2 * cy - py;
|
|
nz = 2 * cz - pz;
|
|
} else {
|
|
px = posView[posStart + (j - 1) * 3];
|
|
py = posView[posStart + (j - 1) * 3 + 1];
|
|
pz = posView[posStart + (j - 1) * 3 + 2];
|
|
nx = posView[posStart + (j + 1) * 3];
|
|
ny = posView[posStart + (j + 1) * 3 + 1];
|
|
nz = posView[posStart + (j + 1) * 3 + 2];
|
|
}
|
|
|
|
if (!isLastSegment) {
|
|
indexArray[iOffset] = vOffset;
|
|
indexArray[iOffset + 1] = vOffset + 1;
|
|
indexArray[iOffset + 2] = vOffset + 2;
|
|
indexArray[iOffset + 3] = vOffset + 2;
|
|
indexArray[iOffset + 4] = vOffset + 1;
|
|
indexArray[iOffset + 5] = vOffset + 3;
|
|
iOffset += 6;
|
|
}
|
|
|
|
if (useFloat64) {
|
|
Cartesian3.fromElements(cx, cy, cz, cartesian);
|
|
Cartesian3.fromElements(px, py, pz, prevCartesian);
|
|
Cartesian3.fromElements(nx, ny, nz, nextCartesian);
|
|
EncodedCartesian3.fromCartesian(cartesian, encodedC);
|
|
EncodedCartesian3.fromCartesian(prevCartesian, encodedP);
|
|
EncodedCartesian3.fromCartesian(nextCartesian, encodedN);
|
|
}
|
|
|
|
// TODO(donmccurdy): Diverging from PolylineCollection.js, which writes
|
|
// internal vertices to buffer 4x, not 2x. Not sure that's needed?
|
|
|
|
// Write each vertex twice for the quad.
|
|
for (let k = 0; k < 2; k++) {
|
|
if (!useFloat64) {
|
|
position[vOffset * 3] = cx;
|
|
position[vOffset * 3 + 1] = cy;
|
|
position[vOffset * 3 + 2] = cz;
|
|
|
|
prevPosition[vOffset * 3] = px;
|
|
prevPosition[vOffset * 3 + 1] = py;
|
|
prevPosition[vOffset * 3 + 2] = pz;
|
|
|
|
nextPosition[vOffset * 3] = nx;
|
|
nextPosition[vOffset * 3 + 1] = ny;
|
|
nextPosition[vOffset * 3 + 2] = nz;
|
|
} else {
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/pull/13302
|
|
Cartesian3.pack(encodedC.high, positionHigh, vOffset * 3);
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/pull/13302
|
|
Cartesian3.pack(encodedC.low, positionLow, vOffset * 3);
|
|
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/pull/13302
|
|
Cartesian3.pack(encodedP.high, prevPositionHigh, vOffset * 3);
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/pull/13302
|
|
Cartesian3.pack(encodedP.low, prevPositionLow, vOffset * 3);
|
|
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/pull/13302
|
|
Cartesian3.pack(encodedN.high, nextPositionHigh, vOffset * 3);
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/pull/13302
|
|
Cartesian3.pack(encodedN.low, nextPositionLow, vOffset * 3);
|
|
}
|
|
|
|
pickColorArray[vOffset * 4] = Color.floatToByte(pickColor.red);
|
|
pickColorArray[vOffset * 4 + 1] = Color.floatToByte(pickColor.green);
|
|
pickColorArray[vOffset * 4 + 2] = Color.floatToByte(pickColor.blue);
|
|
pickColorArray[vOffset * 4 + 3] = Color.floatToByte(pickColor.alpha);
|
|
|
|
showColorWidthAndTexCoordArray[vOffset * 4] = show ? 1 : 0;
|
|
showColorWidthAndTexCoordArray[vOffset * 4 + 1] = encodedColor;
|
|
showColorWidthAndTexCoordArray[vOffset * 4 + 2] = material.width;
|
|
showColorWidthAndTexCoordArray[vOffset * 4 + 3] = j / (jl - 1);
|
|
|
|
alphaArray[vOffset] = colorAlpha * 255.0;
|
|
|
|
vOffset++;
|
|
}
|
|
}
|
|
|
|
polyline._dirty = false;
|
|
}
|
|
}
|
|
|
|
if (!defined(renderContext.vertexArray)) {
|
|
const attributeArrays = renderContext.attributeArrays;
|
|
|
|
renderContext.vertexArray = new VertexArray({
|
|
context,
|
|
|
|
indexBuffer: Buffer.createIndexBuffer({
|
|
context,
|
|
typedArray: renderContext.indexArray,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
// @ts-expect-error https://github.com/CesiumGS/cesium/issues/13420
|
|
indexDatatype: IndexDatatype.fromTypedArray(renderContext.indexArray),
|
|
}),
|
|
|
|
attributes: [
|
|
...(!useFloat64
|
|
? [
|
|
{
|
|
index: BufferPolylineAttributeLocations.position,
|
|
componentDatatype: collection._positionDatatype,
|
|
componentsPerAttribute: 3,
|
|
normalize: collection._positionNormalized,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.position,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
{
|
|
index: BufferPolylineAttributeLocations.prevPosition,
|
|
componentDatatype: collection._positionDatatype,
|
|
componentsPerAttribute: 3,
|
|
normalize: collection._positionNormalized,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.prevPosition,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
{
|
|
index: BufferPolylineAttributeLocations.nextPosition,
|
|
componentDatatype: collection._positionDatatype,
|
|
componentsPerAttribute: 3,
|
|
normalize: collection._positionNormalized,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.nextPosition,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
]
|
|
: [
|
|
{
|
|
index: BufferPolylineAttributeLocationsFloat64.positionHigh,
|
|
componentDatatype: ComponentDatatype.FLOAT,
|
|
componentsPerAttribute: 3,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.positionHigh,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
{
|
|
index: BufferPolylineAttributeLocationsFloat64.positionLow,
|
|
componentDatatype: ComponentDatatype.FLOAT,
|
|
componentsPerAttribute: 3,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.positionLow,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
{
|
|
index: BufferPolylineAttributeLocationsFloat64.prevPositionHigh,
|
|
componentDatatype: ComponentDatatype.FLOAT,
|
|
componentsPerAttribute: 3,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.prevPositionHigh,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
{
|
|
index: BufferPolylineAttributeLocationsFloat64.prevPositionLow,
|
|
componentDatatype: ComponentDatatype.FLOAT,
|
|
componentsPerAttribute: 3,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.prevPositionLow,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
{
|
|
index: BufferPolylineAttributeLocationsFloat64.nextPositionHigh,
|
|
componentDatatype: ComponentDatatype.FLOAT,
|
|
componentsPerAttribute: 3,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.nextPositionHigh,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
{
|
|
index: BufferPolylineAttributeLocationsFloat64.nextPositionLow,
|
|
componentDatatype: ComponentDatatype.FLOAT,
|
|
componentsPerAttribute: 3,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.nextPositionLow,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
]),
|
|
{
|
|
index: attributeLocations.pickColor,
|
|
componentDatatype: ComponentDatatype.UNSIGNED_BYTE,
|
|
componentsPerAttribute: 4,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.pickColor,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
{
|
|
index: attributeLocations.showColorWidthAndTexCoord,
|
|
componentDatatype: ComponentDatatype.FLOAT,
|
|
componentsPerAttribute: 4,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.showColorWidthAndTexCoord,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
{
|
|
index: attributeLocations.alpha,
|
|
componentDatatype: ComponentDatatype.UNSIGNED_BYTE,
|
|
componentsPerAttribute: 1,
|
|
vertexBuffer: Buffer.createVertexBuffer({
|
|
typedArray: attributeArrays.alpha,
|
|
context,
|
|
usage: BufferUsage.STATIC_DRAW,
|
|
}),
|
|
},
|
|
],
|
|
});
|
|
} else if (collection._dirtyCount > 0) {
|
|
const { indexOffset, indexCount, vertexOffset, vertexCount } =
|
|
getPolylineDirtyRanges(collection);
|
|
|
|
renderContext.vertexArray.copyIndexFromRange(
|
|
renderContext.indexArray,
|
|
indexOffset,
|
|
indexCount,
|
|
);
|
|
|
|
for (const key in attributeLocations) {
|
|
if (Object.hasOwn(attributeLocations, key)) {
|
|
const attribute = /** @type {BufferPolylineAttribute} */ (key);
|
|
renderContext.vertexArray.copyAttributeFromRange(
|
|
attributeLocations[attribute],
|
|
renderContext.attributeArrays[attribute],
|
|
vertexOffset,
|
|
vertexCount,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!defined(renderContext.renderState)) {
|
|
renderContext.renderState = RenderState.fromCache({
|
|
blending:
|
|
collection._blendOption === BlendOption.OPAQUE
|
|
? BlendingState.DISABLED
|
|
: BlendingState.ALPHA_BLEND,
|
|
depthTest: { enabled: true },
|
|
});
|
|
}
|
|
|
|
if (!defined(renderContext.shaderProgram)) {
|
|
renderContext.shaderProgram = ShaderProgram.fromCache({
|
|
context,
|
|
vertexShaderSource: new ShaderSource({
|
|
sources: [PolylineCommon, BufferPolylineMaterialVS],
|
|
defines: useFloat64 ? ["USE_FLOAT64"] : [],
|
|
}),
|
|
fragmentShaderSource: new ShaderSource({
|
|
sources: [BufferPolylineMaterialFS],
|
|
}),
|
|
attributeLocations,
|
|
});
|
|
}
|
|
|
|
const drawCount = getDrawIndexCount(collection);
|
|
|
|
if (!defined(renderContext.command)) {
|
|
renderContext.command = new DrawCommand({
|
|
vertexArray: renderContext.vertexArray,
|
|
renderState: renderContext.renderState,
|
|
shaderProgram: renderContext.shaderProgram,
|
|
primitiveType: PrimitiveType.TRIANGLES,
|
|
pass:
|
|
collection._blendOption === BlendOption.OPAQUE
|
|
? Pass.OPAQUE
|
|
: Pass.TRANSLUCENT,
|
|
pickId: collection._allowPicking ? "v_pickColor" : undefined,
|
|
owner: collection,
|
|
count: drawCount,
|
|
modelMatrix: collection.modelMatrix, // shared reference
|
|
boundingVolume: collection.boundingVolume, // shared reference
|
|
debugShowBoundingVolume: collection.debugShowBoundingVolume,
|
|
});
|
|
}
|
|
|
|
const command = renderContext.command;
|
|
|
|
if (command.count !== drawCount) {
|
|
command.count = drawCount;
|
|
}
|
|
|
|
if (command.debugShowBoundingVolume !== collection.debugShowBoundingVolume) {
|
|
command.debugShowBoundingVolume = collection.debugShowBoundingVolume;
|
|
}
|
|
|
|
frameState.commandList.push(command);
|
|
|
|
collection._makeClean();
|
|
|
|
return renderContext;
|
|
}
|
|
|
|
/**
|
|
* Returns number of drawn (not allocated) indices for given collection.
|
|
* @param {BufferPolylineCollection} collection
|
|
* @ignore
|
|
*/
|
|
function getDrawIndexCount(collection) {
|
|
return (collection.vertexCount - collection.primitiveCount) * 6;
|
|
}
|
|
|
|
/**
|
|
* Computes dirty ranges for attribute and index buffers in a collection.
|
|
* @param {BufferPolylineCollection} collection
|
|
* @ignore
|
|
*/
|
|
function getPolylineDirtyRanges(collection) {
|
|
const { _dirtyOffset, _dirtyCount } = collection;
|
|
|
|
collection.get(_dirtyOffset, polyline);
|
|
const vertexOffset = polyline.vertexOffset * 2;
|
|
const segmentOffset = polyline.vertexOffset - _dirtyOffset;
|
|
const indexOffset = segmentOffset * 6;
|
|
|
|
collection.get(_dirtyOffset + _dirtyCount - 1, polyline);
|
|
const vertexCount =
|
|
(polyline.vertexOffset + polyline.vertexCount) * 2 - vertexOffset;
|
|
const segmentCount = vertexCount / 2 - _dirtyCount;
|
|
const indexCount = segmentCount * 6;
|
|
|
|
return { indexOffset, indexCount, vertexOffset, vertexCount };
|
|
}
|
|
|
|
/**
|
|
* Destroys render context resources. Deleting properties from the context
|
|
* object isn't necessary, as collection.destroy() will discard the object.
|
|
* @ignore
|
|
*/
|
|
function destroyRenderContext() {
|
|
const context = /** @type {BufferPolylineRenderContext} */ (this);
|
|
|
|
if (defined(context.vertexArray)) {
|
|
context.vertexArray.destroy();
|
|
}
|
|
|
|
if (defined(context.shaderProgram)) {
|
|
context.shaderProgram.destroy();
|
|
}
|
|
|
|
if (defined(context.renderState)) {
|
|
RenderState.removeFromCache(context.renderState);
|
|
}
|
|
}
|
|
|
|
export default renderBufferPolylineCollection;
|