func SampleCoverage(value float32, invert bool) {
b := C.GLboolean(C.GL_FALSE)
if invert {
b = C.GLboolean(C.GL_TRUE)
}
C.glSampleCoverage(C.GLclampf(value), C.GLboolean(b))
}
func SampleCoverage(
value Clampf, invert bool) {
C.glSampleCoverage(
C.GLclampf(value),
glBoolean(invert))
}