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线样式（无同步间距调节）

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This commit is contained in:
夏大胆
2025-07-07 16:21:01 +08:00
parent 484fe70e16
commit fa3325580c
8 changed files with 373 additions and 77 deletions
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24
src/Obj/Base/PolylineObject/_element.js
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@ -1,7 +1,7 @@
import { attributeElm, labelStyleElm1, labelStyleElm2 } from '../../Element/elm_html'
function html(that) {
return `
return `
<span class="custom-divider"></span>
<div class="div-item">
<div class="row" style="align-items: flex-start;">
@ -97,6 +97,28 @@ function html(that) {
<div class="col">
</div>
</div>
<div class="row" id="dashTextureDom">
<div class="col">
<span class="label">动画顺向</span>
<input class="btn-switch" type="checkbox" @model="rotate">
</div>
<div class="col">
<span class="label">动画倍数</span>
<div class="input-number input-number-unit-1" style="width: 80px;">
<input class="input" type="number" title="" min="0" max="999999" step="0.1" @model="speed">
<span class="arrow"></span>
</div>
</div>
<div class="col" >
<span id="lineSpace">
<span class="label">间距</span>
<div class="input-number input-number-unit-1" style="width: 80px;">
<input class="input" type="number" title="" min="0" max="3" step="0.1" @model="space">
<span class="arrow"></span>
</div>
</span>
</div>
</div>
<div class="row">
<div class="col">
<span class="label">线段缓冲</span>

130
src/Obj/Base/PolylineObject/index.js
View File

@ -57,6 +57,10 @@ class PolylineObject extends Base {
this.options['nose-to-tail'] = options['nose-to-tail'] || false
this.options.smooth = options.smooth || false
this.options.extend = options.extend || false
this.options.rotate = options.rotate || true
this.options.space = options.space || 0.1
this.options.speed = options.speed || 1
this.options.dashSize = options.dashSize || 0.03
this.options['length-unit'] = options['length-unit'] || '米'
this.options['fit-length-unit'] = options['fit-length-unit'] || '米'
this.options['extend-width'] =
@ -144,7 +148,7 @@ class PolylineObject extends Base {
}
set color(v) {
this.options.color = v
this.entity.polyline.material = this.getMaterial(v, this.options.type)
this.entity.polyline.material = this.getMaterial(v, this.options.type, this.entity, this.options)
if (this._elms.color) {
this._elms.color.forEach((item, i) => {
let colorPicker = new ewPlugins('colorpicker', {
@ -166,6 +170,48 @@ class PolylineObject extends Base {
}
}
get speed() {
return this.options.speed
}
set speed(v) {
this.options.speed = v
this.entity.polyline.material = this.getMaterial(this.options.color, this.options.type, this.entity, this.options)
}
get dashSize() {
return this.options.dashSize
}
set dashSize(v) {
this.options.dashSize = v
this.entity.polyline.material = this.getMaterial(this.options.color, this.options.type, this.entity, this.options)
}
get rotate() {
return this.options.rotate
}
set rotate(v) {
this.options.rotate = v
PolylineObject.closeNodeEdit(this)
this._elms.rotate &&
this._elms.rotate.forEach(item => {
item.checked = v
})
this.options.rotate = v
this.entity.polyline.material = this.getMaterial(this.options.color, this.options.type, this.entity, this.options)
}
get space() {
return this.options.space
}
set space(v) {
this.options.space = v
this.entity.polyline.material = this.getMaterial(this.options.color, this.options.type, this.entity, this.options)
}
get length() {
return this.options.length
}
@ -298,6 +344,31 @@ class PolylineObject extends Base {
name: '流动箭头1',
value: '流动箭头1',
key: 7
},
{
name: '流动箭头2',
value: '流动箭头2',
key: 8
},
{
name: '流动箭头3',
value: '流动箭头3',
key: 9
},
{
name: '流动箭头4',
value: '流动箭头4',
key: 10
},
{
name: '流动箭头5',
value: '流动箭头5',
key: 11
},
{
name: '流动箭头6',
value: '流动箭头6',
key: 12
}
]
this.options.type = Number(v)
@ -306,6 +377,16 @@ class PolylineObject extends Base {
this._elms.lineType &&
this._elms.lineType.forEach(item => {
item.value = lineTypeData[i].value
if (2 < item.value && item.value < 13) {//贴图参数
document.getElementById('dashTextureDom').style.display = 'flex'
} else {
document.getElementById('dashTextureDom').style.display = 'none'
}
if (2 < item.value && item.value < 5) {//尾迹参数
document.getElementById('lineSpace').style.display = 'none'
} else {
document.getElementById('lineSpace').style.display = 'flex'
}
})
break
}
@ -314,7 +395,9 @@ class PolylineObject extends Base {
this.entity.polyline &&
(this.entity.polyline.material = this.getMaterial(
this.options.color,
this.options.type
this.options.type,
this.entity,
this.options
))
}
get noseToTail() {
@ -1177,7 +1260,7 @@ class PolylineObject extends Base {
positions: Cesium.Cartesian3.fromDegreesArrayHeights(fromDegreesArray),
width: that.options.width,
clampToGround: ground,
material: that.getMaterial(that.options.color, that.options.type),
material: that.getMaterial(that.options.color, that.options.type, that.entity, that.options),
zIndex: that.sdk._entityZIndex
}
})
@ -1540,6 +1623,31 @@ class PolylineObject extends Base {
name: '流动箭头1',
value: '流动箭头1',
key: 7
},
{
name: '流动箭头2',
value: '流动箭头2',
key: 8
},
{
name: '流动箭头3',
value: '流动箭头3',
key: 9
},
{
name: '流动箭头4',
value: '流动箭头4',
key: 10
},
{
name: '流动箭头5',
value: '流动箭头5',
key: 11
},
{
name: '流动箭头6',
value: '流动箭头6',
key: 12
}
]
let lineTypeDataLegpObject = legp(
@ -1565,6 +1673,18 @@ class PolylineObject extends Base {
for (let i = 0; i < lineTypeData.length; i++) {
if (lineTypeData[i].value === lineTypeDataLegpElm.value) {
this.lineType = lineTypeData[i].key
//控制参数显隐
if (2 < this.lineType && this.lineType < 13) {//贴图参数
document.getElementById('dashTextureDom').style.display = 'flex'
} else {
document.getElementById('dashTextureDom').style.display = 'none'
}
if (2 < this.lineType && this.lineType < 5) {//尾迹参数
document.getElementById('lineSpace').style.display = 'none'
} else {
document.getElementById('lineSpace').style.display = 'flex'
}
break
}
}
@ -1984,6 +2104,10 @@ class PolylineObject extends Base {
this.attributeVr = this.options.attribute.vr.content
this.attributeCamera = this.options.attribute.camera.content
this.attributeGoods = this.options.attribute.goods.content
this.rotate = this.originalOptions.rotate
this.speed = this.originalOptions.speed
this.dashSize = this.originalOptions.dashSize
this.space = this.originalOptions.space
this.cameraSelect && this.cameraSelect()
this.goodsSelect && this.goodsSelect()

32
src/Obj/Materail/FlowDashedLineFlowMaterialProperty.js
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@ -8,8 +8,12 @@ function FlowDashedLine() {
this._color = undefined;
this._speed = undefined;
this._uType = undefined;
this._space = undefined;
this._dashSize = undefined;
this.color = new Cesium.Color.fromCssColorString(options.color || "rgba(255,255,255,1)");
this.speed = options.speed || 0.25;//速度
this.speed = options.speed != undefined ? options.speed : 1.0;//速度
this.space = options.space || 0.01;//速度
this.dashSize = options.dashSize || 0.03;//速度
this.uType = options.uType === undefined ? 1 : options.uType;//类型：0：普通流动线 1：虚化虚线
this.lineBackAlpha = options.lineBackAlpha || 0.05;
}
@ -43,6 +47,18 @@ function FlowDashedLine() {
10,
result.speed
);
result.space = Cesium.Property.getValueOrDefault(
this._space,
time,
10,
result.space
);
result.dashSize = Cesium.Property.getValueOrDefault(
this._dashSize,
time,
10,
result.dashSize
);
result.uType = Cesium.Property.getValueOrDefault(
this._uType,
time,
@ -69,6 +85,8 @@ function FlowDashedLine() {
Object.defineProperties(FlowDashedLineFlowMaterialProperty.prototype, {
color: Cesium.createPropertyDescriptor("color"),
speed: Cesium.createPropertyDescriptor("speed"),
space: Cesium.createPropertyDescriptor("space"),
dashSize: Cesium.createPropertyDescriptor("dashSize"),
uType: Cesium.createPropertyDescriptor("uType"),
transparency: Cesium.createPropertyDescriptor("lineBackAlpha"),
});
@ -89,11 +107,13 @@ function FlowDashedLine() {
// 计算流动虚线
float dashSize = 0.03;
float gapSize = 0.01;
float progress = fract(czm_frameNumber * 0.01); // 时间控制流动
// float gapSize = 0.01;
// float dashSize = dashSize;
float gapSize = space;
float progress = fract(speed * czm_frameNumber * 0.01); // 时间控制流动
float pattern = fract(st.x / (dashSize + gapSize) + progress);
float dash1 = step(0.1, pattern) - step(0.9, pattern);
float dash2 = smoothstep(0.1, 0.3, pattern) - smoothstep(0.7, 0.9, pattern);
float dash2 = smoothstep(0.0, 0.4, pattern) - smoothstep(0.6, 1.0, pattern);
float dash = (float(uType) != 1.0)?dash1:dash2;
material.alpha = dash;
material.diffuse = color.rgb;
@ -108,7 +128,9 @@ function FlowDashedLine() {
type: Cesium.Material.FlowDashedLineMaterialType,
uniforms: {
color: new Cesium.Color(1.0, 1.0, 1.0, 1.0),
speed: 0.1,
speed: 1,
space: 0.01,
dashSize: 0.03,
uType: 1,
lineBackAlpha: 0.05,
},

52
src/Obj/Materail/LineTextureMaterialProperty.js
View File

@ -7,10 +7,12 @@ function LineTexture() {
this._definitionChanged = new Cesium.Event();
this._image = undefined;
this._color = undefined;
this._imageW = undefined;
this._speed = undefined;
this._repeat = undefined;
this.image = options.image || "";
this.color = new Cesium.Color.fromCssColorString(options.color || "rgba(255,255,255,1)");
this.imageW = options.imageW || 1;
this.speed = options.speed != undefined ? options.speed : 1.0;
this.repeat = options.repeat || 1.0;
}
get isConstant() {
@ -41,11 +43,17 @@ function LineTexture() {
Cesium.Color.RED,
result.color
);
result.imageW = Cesium.Property.getValueOrDefault(
this._imageW,
result.speed = Cesium.Property.getValueOrDefault(
this._speed,
time,
1,
result.imageW
1.0,
result.speed
);
result.repeat = Cesium.Property.getValueOrDefault(
this._repeat,
time,
1.0,
result.repeat
);
return result;
}
@ -56,7 +64,8 @@ function LineTexture() {
(other instanceof LineTextureMaterialProperty &&
Cesium.Property.equals(this._image, other._image) &&
Cesium.Property.equals(this._color, other._color) &&
Cesium.Property.equals(this._imageW, other._imageW))
Cesium.Property.equals(this._imageW, other._imageW) &&
Cesium.Property.equals(this._speed, other._speed))
);
}
}
@ -64,27 +73,27 @@ function LineTexture() {
Object.defineProperties(LineTextureMaterialProperty.prototype, {
image: Cesium.createPropertyDescriptor("image"),
color: Cesium.createPropertyDescriptor("color"),
imageW: Cesium.createPropertyDescriptor("imageW"),
speed: Cesium.createPropertyDescriptor("speed"),
repeat: Cesium.createPropertyDescriptor("repeat"),
});
Cesium.LineTextureMaterialProperty = LineTextureMaterialProperty;
Cesium.Material.LineTextureMaterialProperty = "LineTextureMaterialProperty";
Cesium.Material.LineTextureMaterialType = "LineTextureMaterialType";
Cesium.Material.LineTextureMaterialSource = `
#extension GL_OES_standard_derivatives : enable
uniform vec4 color;
uniform sampler2D image;
uniform float speed;
uniform float repeat;
czm_material czm_getMaterial(czm_materialInput materialInput)
{
czm_material m = czm_getDefaultMaterial(materialInput);
vec2 st = materialInput.st * vec2(494/172, 1.0); // 横向重复两次
vec2 uv = vec2(fract(st.s + uTime*0.1), st.t);
// uv.y = mix(uv.y, 1.0-uv.y, step(0.5, fract(uTime))); // 周期性反转Y轴
vec4 tex = texture(image, uv);
m.diffuse =(tex.rgb+color.rgb)/2.0;
m.alpha = tex.a * (1.0 - fract(st.t)) * color.a; // 顶部渐隐
return m;
czm_material material = czm_getDefaultMaterial(materialInput);
vec2 st = materialInput.st;
st.s *= repeat; // 关键：通过repeat控制纹理密度
vec4 colorImage = texture2D(image, vec2(fract(st.s + speed*czm_frameNumber* 0.01), st.t));
material.alpha = colorImage.a * color.a;
material.diffuse = color.rgb;
return material;
}
`;
Cesium.Material._materialCache.addMaterial(
@ -95,7 +104,8 @@ function LineTexture() {
uniforms: {
color: new Cesium.Color(1.0, 1.0, 1.0, 1.0),
image: '',
imageW: 1,
repeat: 1.0,
speed: 1.0,
uTime: 1
},
source: Cesium.Material.LineTextureMaterialSource,

23
src/Obj/Materail/PolylineFlowMaterialProperty.js
View File

@ -7,9 +7,11 @@ function PolylineFlow() {
this._definitionChanged = new Cesium.Event();
this._color = undefined;
this._speed = undefined;
this._rotate = undefined;
this.color = new Cesium.Color.fromCssColorString(options.color || "rgba(255,255,255,1)");
this.speed = options.speed || 0.25;//速度
this.speed = options.speed != undefined ? options.speed : 1.0;//速度
this.lineBackAlpha = options.lineBackAlpha || 0.05;
this.rotate = options.rotate;
}
get isConstant() {
@ -41,6 +43,12 @@ function PolylineFlow() {
10,
result.speed
);
result.rotate = Cesium.Property.getValueOrDefault(
this._rotate,
time,
true,
result.rotate
);
result.lineBackAlpha = this.lineBackAlpha;
result.frameNumber = Cesium.getTimestamp();
return result;
@ -60,6 +68,7 @@ function PolylineFlow() {
Object.defineProperties(PolylineFlowMaterialProperty.prototype, {
color: Cesium.createPropertyDescriptor("color"),
speed: Cesium.createPropertyDescriptor("speed"),
rotate: Cesium.createPropertyDescriptor("rotate"),
transparency: Cesium.createPropertyDescriptor("lineBackAlpha"),
});
@ -78,11 +87,16 @@ function PolylineFlow() {
//获取st（uv）
vec2 st = materialInput.st;
//获取当前帧数，10秒内变化0-1
float time = fract(czm_frameNumber * speed / 60.0);
// float time = fract(czm_frameNumber * speed / 60.0);
float time = fract(abs(speed) * czm_frameNumber * 0.01);
//长度1/10
time = time * (1.0 + 0.1);
// time = time * (1.0 + 0.1);
float staticAlpha = rotate?smoothstep(0.0,1.0, 1.0-st.s) * step(-1.0,-(1.0-st.s)):smoothstep(0.0,1.0, st.s) * step(-1.0,-st.s);
//平滑过渡函数
float alpha = smoothstep(time-0.1,time,st.s) * step(-time,-st.s);
float alpha1 = smoothstep(time-0.1,time,1.0-st.s) * step(-time,- (1.0-st.s));
float alpha2 = smoothstep(time-0.1,time,st.s) * step(-time,- st.s);
float alpha =(speed== 0.0)? staticAlpha:(speed < 0.0)?alpha2:alpha1;
//光带轨迹（不会完全透明）
alpha += lineBackAlpha;
material.alpha = alpha;
@ -99,6 +113,7 @@ function PolylineFlow() {
uniforms: {
color: new Cesium.Color(1.0, 1.0, 1.0, 1.0),
speed: 0.1,
rotate: true,
lineBackAlpha: 0.05,
},
source: Cesium.Material.PolylineFlowMaterialSource,

41
src/Obj/Materail/PolylineFlowMultMaterialProperty.js
View File

@ -7,9 +7,11 @@ function PolylineFlowMult() {
this._definitionChanged = new Cesium.Event();
this._color = undefined;
this._speed = undefined;
this._rotate = undefined;
this.color = new Cesium.Color.fromCssColorString(options.color || "rgba(255,255,255,1)");
this.speed = options.speed || 0.1;//速度
this.speed = options.speed != undefined ? options.speed : 1.0;//速度
this.lineBackAlpha = options.lineBackAlpha || 0.05;
this.rotate = options.rotate;
}
get isConstant() {
@ -41,6 +43,12 @@ function PolylineFlowMult() {
10,
result.speed
);
result.rotate = Cesium.Property.getValueOrDefault(
this._rotate,
time,
true,
result.rotate
);
result.lineBackAlpha = this.lineBackAlpha;
result.frameNumber = Cesium.getTimestamp();
return result;
@ -52,6 +60,7 @@ function PolylineFlowMult() {
(other instanceof PolylineFlowMultMaterialProperty &&
Cesium.Property.equals(this._color, other._color) &&
Cesium.Property.equals(this._speed, other.speed) &&
Cesium.Property.equals(this._rotate, other.rotate) &&
Cesium.Property.equals(this.lineBackAlpha, other.lineBackAlpha))
);
}
@ -60,6 +69,7 @@ function PolylineFlowMult() {
Object.defineProperties(PolylineFlowMultMaterialProperty.prototype, {
color: Cesium.createPropertyDescriptor("color"),
speed: Cesium.createPropertyDescriptor("speed"),
rotate: Cesium.createPropertyDescriptor("rotate"),
transparency: Cesium.createPropertyDescriptor("lineBackAlpha"),
});
@ -80,27 +90,47 @@ function PolylineFlowMult() {
float baseTime = fract(czm_frameNumber * speed / 60.0) * 1.1;
// 高频时间轴（控制高光点）
float highlightTime = fract(czm_frameNumber * speed * 3.0 / 60.0);
// float highlightTime = fract(czm_frameNumber * speed * 3.0 / 60.0);
float highlightTime = fract(abs(speed) * czm_frameNumber * 0.01);
float highlightSpacing = 0.3; // 高光点间隔
// 主光带透明度计算
float mainAlpha = smoothstep(baseTime-0.1, baseTime, st.s) * step(-baseTime, -st.s);
// 多高光点计算（3个周期性光斑）
float highlight1 = smoothstep(highlightTime-0.05, highlightTime, st.s) *
float highlight11 = smoothstep(highlightTime-0.05, highlightTime, st.s) *
step(-highlightTime, -st.s) *
(1.0 - smoothstep(0.0, highlightSpacing, abs(st.s - highlightTime)));
float highlight2 = smoothstep(highlightTime+highlightSpacing-0.05,
float highlight21 = smoothstep(highlightTime+highlightSpacing-0.05,
highlightTime+highlightSpacing, st.s) *
step(-(highlightTime+highlightSpacing), -st.s) *
(1.0 - smoothstep(0.0, highlightSpacing, abs(st.s - (highlightTime+highlightSpacing))));
float highlight3 = smoothstep(highlightTime+2.0*highlightSpacing-0.05,
float highlight31 = smoothstep(highlightTime+2.0*highlightSpacing-0.05,
highlightTime+2.0*highlightSpacing, st.s) *
step(-(highlightTime+2.0*highlightSpacing), -st.s) *
(1.0 - smoothstep(0.0, highlightSpacing, abs(st.s - (highlightTime+2.0*highlightSpacing))));
float highlight12 = smoothstep(highlightTime-0.05, highlightTime, 1.0 - st.s) *
step(-highlightTime, -(1.0-st.s)) *
(1.0 - smoothstep(0.0, highlightSpacing, abs(1.0 - st.s - highlightTime)));
float highlight22 = smoothstep(highlightTime+highlightSpacing-0.05,
highlightTime+highlightSpacing, 1.0 - st.s) *
step(-(highlightTime+highlightSpacing),-(1.0 - st.s)) *
(1.0 - smoothstep(0.0, highlightSpacing, abs(1.0-st.s - (highlightTime+highlightSpacing))));
float highlight32 = smoothstep(highlightTime+2.0*highlightSpacing-0.05,
highlightTime+2.0*highlightSpacing, 1.0 - st.s) *
step(-(highlightTime+2.0*highlightSpacing), -(1.0-st.s)) *
(1.0 - smoothstep(0.0, highlightSpacing, abs(1.0 - st.s - (highlightTime+2.0*highlightSpacing))));
float highlight1 = !rotate?highlight11:highlight12;
float highlight2 = !rotate?highlight21:highlight22;
float highlight3 = !rotate?highlight31:highlight32;
// 合并效果
// material.alpha = mainAlpha * 0.7 +
// (highlight1 + highlight2 + highlight3) * 0.5 +
@ -120,6 +150,7 @@ function PolylineFlowMult() {
uniforms: {
color: new Cesium.Color(1.0, 1.0, 1.0, 1.0),
speed: 0.1,
rotate: true,
lineBackAlpha: 0.05,
},
source: Cesium.Material.PolylineFlowMaterialSource,

142
src/Tools/index.js
View File

@ -10,6 +10,7 @@ import { Proj } from './proj'
import { open as projConvertOpen, close as projConvertClose } from './projConvert'
import { open as projectionConvertOpen, close as projectionConvertClose } from './projectionConvert'
import { setActiveViewer, closeRotateAround, closeViewFollow } from '../Global/global'
import FlowPictureMaterialProperty from '../Obj/Materail/FlowPictureMaterialProperty'
class Tools {
/**
@ -513,8 +514,11 @@ class Tools {
return res
}
getMaterial(color = '#2ab0c2', type = 0) {
getMaterial(color = '#2ab0c2', type = 0, entity = null, newParam = {}) {
let material = ''
switch (Number(type)) {
case 1: //虚线
@ -531,60 +535,51 @@ class Tools {
break
case 3: //尾迹光线
material = new Cesium.PolylineFlowMaterialProperty({
color: color
color: color,
speed: newParam.rotate ? newParam.speed : 0 - newParam.speed,
rotate: newParam.rotate
})
break
case 4: //多尾迹光线
material = new Cesium.PolylineFlowMultMaterialProperty({
color: color
color: color,
speed: newParam.rotate ? newParam.speed : 0 - newParam.speed,
rotate: newParam.rotate
})
break
case 5: //普通流动虚线
material = new Cesium.FlowDashedLineFlowMaterialProperty({
color: color,
uType: 0
uType: 0,
speed: newParam.rotate ? newParam.speed : 0 - newParam.speed,
// dashSize: newParam.dashSize,
space: newParam.space
})
break
case 6: //流动虚线2
material = new Cesium.FlowDashedLineFlowMaterialProperty({
color: color,
uType: 1
uType: 1,
speed: newParam.rotate ? newParam.speed : 0 - newParam.speed,
// dashSize: newParam.dashSize,
space: newParam.space
})
break
case 7: //流动箭头1
material = new Cesium.LineTextureMaterialProperty({
case 8: //流动箭头2
case 9: //流动箭头3
case 10: //流动箭头4
case 11: //流动箭头5
case 12: //流动箭头6
let param = {
color: color,
image: this.getSourceRootPath() + '/img/arrow/2.png',
// imageW: 172
})
// let that = this
// var curCanvas = 'a';
// let i = 0;
// function drawCanvasImage(time, result) {
// let canvas = document.createElement('canvas');
// canvas.id = "canvas-" + curCanvas;
// // document.getElementById('app').appendChild(canvas)
// // var canvas = document.getElementById("canvas-" + curCanvas);
// let cwidth = 494;
// let cheight = 172;
// var ctx = canvas.getContext("2d");
// var img = new Image();
// img.src = that.getSourceRootPath() + '/img/arrow/1.png';
// ctx.clearRect(0, 0, cwidth, cheight);
// img.onload = function () {
// if (i <= cwidth) {
// ctx.drawImage(img, i, 0);
// } else
// i = 0;
// i += 3;
// }
// curCanvas = curCanvas === 'a' ? 'b' : 'a';
// return canvas;
// }
// material = new Cesium.ImageMaterialProperty({
// image: new Cesium.CallbackProperty(drawCanvasImage, false),
// transparent: true
// })
image: this.getSourceRootPath() + `/img/arrow/${type - 6}.png`,
space: newParam.space,
speed: newParam.speed
}
param.speed = newParam.rotate ? param.speed : 0 - param.speed
this.getFlowTexture(this, param, entity)
break
default:
material = Cesium.Color.fromCssColorString(color)
@ -592,6 +587,79 @@ class Tools {
}
return material
}
getFlowTexture(that, options, entity) {
const canvasEle = document.createElement('canvas');
const ctx = canvasEle.getContext('2d')
const myImg = new Image()
// myImg.src = that.getSourceRootPath() + '/img/arrow/1.png'
myImg.src = options.image
myImg.onload = function () {
if (options.speed > 0 || options.speed == 0) {
canvasEle.width = myImg.width * (options.space + 1)
canvasEle.height = myImg.height
ctx.drawImage(myImg, myImg.width * (options.space / 2), 0)
} else {
ctx.clearRect(0, 0, canvasEle.width, canvasEle.height);
ctx.save(); // 保存当前状态
canvasEle.width = myImg.width * (options.space + 1)
canvasEle.height = myImg.height
ctx.translate(canvasEle.width / 2, canvasEle.height / 2); // 移动原点至中心
ctx.rotate(Math.PI); // （弧度制）
ctx.drawImage(myImg, -myImg.width * (options.space / 2), -myImg.height / 2)
ctx.restore(); // 恢复状态
}
// let repeat = getRepeat()
// }, false)
entity.polyline.material = new Cesium.LineTextureMaterialProperty(
{
color: options.color,
// image: options.image,
image: canvasEle,
speed: options.speed,
// repeat: repeat
repeat: new Cesium.CallbackProperty(function () {
// function getRepeat() {
var positionProperty = entity.polyline.positions;
var positions = positionProperty.getValue(that.sdk.viewer.clock.currentTime);
if (!Cesium.defined(positions)) {
// return new Cesium.Cartesian2(1.0, 1.0);
return 1.0;
}
var distance = 0;
for (var i = 0; i < positions.length - 1; ++i) {
distance += Cesium.Cartesian3.distance(positions[i], positions[i + 1]);
}
var repeatX = distance / entity.polyline.width.getValue();
// 根据地图缩放程度调整repeatX
var cameraHeight = that.sdk.viewer.camera.positionCartographic.height;
var boundingSphere = new Cesium.BoundingSphere(
new Cesium.Cartesian3(-1000000, 0, 0), // 中心点坐标
500000 // 半径（距离）
);
// 获取绘图缓冲区的宽度和高度（通常是屏幕的分辨率）
var drawingBufferWidth = that.sdk.viewer.canvas.clientWidth;
var drawingBufferHeight = that.sdk.viewer.canvas.clientHeight;
// 使用 getPixelSize 方法获取包围球在屏幕上的像素大小
var groundResolution = that.sdk.viewer.scene.camera.getPixelSize(boundingSphere, drawingBufferWidth, drawingBufferHeight)
// repeatX *= groundResolution / cameraHeight / ((myImg.width / myImg.height * 5) + 1);
repeatX *= groundResolution / cameraHeight / (options.space * (canvasEle.width / canvasEle.height * 5) + 1);
// if (repeatX < 3) {
// repeatX = 3
// }
// return new Cesium.Cartesian2(repeatX, 1.0);
return repeatX;
})
}
)
}
}
/*创建直箭头图片*/
create_arrow1_picture(color) {