WebGLRenderingContext.polygonOffset()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The WebGLRenderingContext.polygonOffset()
method of the WebGL API specifies the scale factors and units to calculate depth values.
The offset is added before the depth test is performed and before the value is written into the depth buffer.
语法
void gl.polygonOffset(factor, units);
参数
返回值
None.
例子
The polygon offset fill is disabled by default. To enable or disable polygon offset fill, use the enable()
and disable()
methods with the argument gl.POLYGON_OFFSET_FILL
.
js
gl.enable(gl.POLYGON_OFFSET_FILL);
gl.polygonOffset(2, 3);
想要查看当前多边形偏移的 factor 或 units,查询 POLYGON_OFFSET_FACTOR
和POLYGON_OFFSET_UNITS
的内容即可。
js
gl.getParameter(gl.POLYGON_OFFSET_FACTOR); // 2
gl.getParameter(gl.POLYGON_OFFSET_UNITS); // 3
规范
Specification |
---|
WebGL Specification # 5.14.3 |
Browser compatibility
BCD tables only load in the browser