我正在尋找在 Javascript 中計(jì)算 THREE.DataTexture 的 texel 引用，以便在片段著色器中使用。我已經(jīng)成功地計(jì)算了點(diǎn)的屏幕空間坐標(biāo)，并將它們以 x 和 y 值的統(tǒng)一浮點(diǎn)數(shù)組形式傳遞給著色器，然后通過(guò)著色器中的索引引用這些點(diǎn)。我現(xiàn)在想要渲染太多點(diǎn)以在統(tǒng)一浮點(diǎn)數(shù)組中傳遞坐標(biāo)，所以我想使用 DataTexture 并在 RGBA 紋素的 RG 值中寫入坐標(biāo)。var tDataWidth = points.length;var tData = new Uint8Array( Math.pow(tDataWidth, 2) );var texelSize = 1.0 / tDataWidth;var texelOffset = new THREE.Vector2(0.5 * texelSize, 0.5 * texelSize);for(var i = 0; i < points.length; i++){    //convert data to 0-1, then to 0-255    //inverse is to divide by 255 then multiply by width, height respectively    tData[i * 4] = Math.round(255 * (points[i].x / window.innerWidth));    tData[i * 4 + 1] = Math.round(255 * ((window.innerHeight - points[i].y) / window.innerHeight));    tData[i * 4 + 2] = 0;    tData[i * 4 + 3] = 0;    //calculate UV texel coordinates here    //Correct after edit    var u = ((i % tDataWidth) / tDataWidth) + texelOffset;    var v = (Math.floor(i / tDataWidth) + texelOffset);    var vUV = new THREE.Vector2(u, v);    //this function inserts the reference to the texel at the index into the shader    //referenced in the frag shader:    //cvec = texture2D(tData, index);    shaderInsert += ShaderInsert(vUV, screenPos.x, window.innerHeight - screenPos.y);}var dTexture = new THREE.DataTexture( sdfUItData, tDataWidth, tDataWidth, THREE.RGBAFormat, THREE.UnsignedByteType );//I think this is necessarydTexture.magFilter = THREE.NearestFilter;dTexture.needsUpdate = true;//update uniforms of shader to get this DataTexturerenderer.getUniforms("circles")["tData"].value = dTexture;//return string insert of circle//I'm editing the shader through javascript then recompiling it//There's more to it in the calling function, but this is the relevant part I think    ...對(duì)我出錯(cuò)的地方有什么幫助嗎？現(xiàn)在輸出都在左下角，所以 (0, window.innerHeight) 據(jù)我所知。謝謝！