我使用的代碼創建一個幀緩衝中的WebGL:WebGL的幀緩衝區是空白
this.buffer = ctx.createFramebuffer();
ctx.bindFramebuffer(ctx.FRAMEBUFFER, this.buffer);
this.depthTexture = this.createTexture(ctx, ctx.DEPTH_COMPONENT,
ctx.DEPTH_COMPONENT, ctx.UNSIGNED_SHORT);
ctx.framebufferTexture2D(ctx.FRAMEBUFFER, ctx.DEPTH_ATTACHMENT,
ctx.TEXTURE_2D, this.depthTexture, 0);
this.colourTexture = this.createTexture(ctx, ctx.RGBA, ctx.RGBA, ctx.FLOAT);
ctx.framebufferTexture2D(ctx.FRAMEBUFFER, ctx.COLOR_ATTACHMENT0,
ctx.TEXTURE_2D, this.colourTexture, 0);
抽獎,它使用
this.ctx.useProgram(this.forwardShader.program);
this.ctx.bindFramebuffer(this.ctx.FRAMEBUFFER, this.framebuffer.buffer);
this.ctx.viewport(0, 0, this.framebuffer.size, this.framebuffer.size);
this.ctx.clear(this.ctx.COLOR_BUFFER_BIT | this.ctx.DEPTH_BUFFER_BIT);
mat4.identity(this.viewMatrix);
mat4.identity(this.modelMatrix);
this.camera.transform(this.viewMatrix);
mat4.translate(this.modelMatrix, this.modelMatrix, [0, 0, -2]);
this.mStack.pushMatrix(this.modelMatrix);
mat4.translate(this.modelMatrix, this.modelMatrix, [0, -1, 0]);
mat4.rotateX(this.modelMatrix, this.modelMatrix, -Math.PI/2.0);
this.setShaderUniforms();
this.plane.draw(this.forwardShader);
this.mStack.popMatrix(this.modelMatrix);
this.setShaderUniforms();
this.cube.draw(this.forwardShader);
this.ctx.bindFramebuffer(this.ctx.FRAMEBUFFER, null);
然後渲染使用
this.ctx.useProgram(this.renderTextureShader.program);
this.ctx.viewport(0, 0, this.viewportWidth, this.viewportHeight);
this.ctx.clear(this.ctx.COLOR_BUFFER_BIT | this.ctx.DEPTH_BUFFER_BIT);
this.renderTexture.draw(this.framebuffer.colourTexture, this.renderTextureShader);
結果它完美的工作,但是當我改變它來渲染深度紋理時,我得到一個白色的屏幕。我已經檢查了相關的擴展名被啓用和(儲存數組把它們顯然,如果他們得到gc'ed它可能會導致錯誤。在什麼即時做錯將是巨大的
的完整代碼可以在我找到的任何反饋bitbucket
深度線性化可以幫助https://stackoverflow.com/a/44357374/3012928 –