WebGLRenderingContext: polygonOffset() method
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.
Note: This feature is available in Web Workers.
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.
Syntax
polygonOffset(factor, units)
Parameters
Return value
None (undefined
).
Examples
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
.
gl.enable(gl.POLYGON_OFFSET_FILL);
gl.polygonOffset(2, 3);
To check the current polygon offset factor or units, query the
POLYGON_OFFSET_FACTOR
and POLYGON_OFFSET_UNITS
constants.
gl.getParameter(gl.POLYGON_OFFSET_FACTOR); // 2
gl.getParameter(gl.POLYGON_OFFSET_UNITS); // 3
Specifications
Specification |
---|
WebGL Specification # 5.14.3 |
Browser compatibility
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