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glTriangles optimization

This commit is contained in:
faiface 2017-01-25 23:51:27 +01:00
parent 9a4c02e488
commit 95444e8540
1 changed files with 20 additions and 0 deletions
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20
gltriangles.go
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@ -58,6 +58,26 @@ func (gt *glTriangles) resize(len int) {
} }
func (gt *glTriangles) updateData(offset int, t Triangles) { func (gt *glTriangles) updateData(offset int, t Triangles) {
// TrianglesData short path
if t, ok := t.(*TrianglesData); ok {
for i := offset; i < offset+t.Len(); i++ {
var (
px, py = (*t)[i].Position.XY()
col = (*t)[i].Color
tx, ty = (*t)[i].Texture.XY()
)
gt.data[i*gt.vs.Stride()+0] = float32(px)
gt.data[i*gt.vs.Stride()+1] = float32(py)
gt.data[i*gt.vs.Stride()+2] = float32(col.R)
gt.data[i*gt.vs.Stride()+3] = float32(col.G)
gt.data[i*gt.vs.Stride()+4] = float32(col.B)
gt.data[i*gt.vs.Stride()+5] = float32(col.A)
gt.data[i*gt.vs.Stride()+6] = float32(tx)
gt.data[i*gt.vs.Stride()+7] = float32(ty)
}
return
}
if t, ok := t.(TrianglesPosition); ok { if t, ok := t.(TrianglesPosition); ok {
for i := offset; i < offset+t.Len(); i++ { for i := offset; i < offset+t.Len(); i++ {
px, py := t.Position(i).XY() px, py := t.Position(i).XY()