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add VertexArray.Indices

This commit is contained in:
faiface 2016-12-16 00:41:03 +01:00
parent 2aaab88e07
commit 560e79511e
1 changed files with 15 additions and 0 deletions
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15
pixelgl/vertex.go
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@ -183,6 +183,21 @@ func (va *VertexArray) SetIndices(indices []int) {
}) })
} }
// Indices returns the current indices of triangles to be drawn.
func (va *VertexArray) Indices() []int {
indices32 := make([]uint32, va.indexNum)
Do(func() {
va.ebo.bind()
gl.GetBufferSubData(gl.ELEMENT_ARRAY_BUFFER, 0, 4*len(indices32), gl.Ptr(indices32))
va.ebo.restore()
})
indices := make([]int, len(indices32))
for i := range indices {
indices[i] = int(indices32[i])
}
return indices
}
// SetVertexAttr sets the value of the specified vertex attribute of the specified vertex. // SetVertexAttr sets the value of the specified vertex attribute of the specified vertex.
// //
// If the vertex attribute does not exist, this method returns false. If the vertex is out of range, // If the vertex attribute does not exist, this method returns false. If the vertex is out of range,