WebGLRenderingContext: polygonOffset() method
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
js
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
.
js
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.
js
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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