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optimize batch draw (reduce allocations)

This commit is contained in:
faiface 2017-01-12 19:30:36 +01:00
parent 268e1b72f5
commit c8627e1e93
1 changed files with 8 additions and 8 deletions
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16
batch.go
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@ -80,24 +80,24 @@ func (b *Batch) SetMaskColor(c color.Color) {
type batchTriangles struct {
Triangles
trans Triangles
data TrianglesData
batch *Batch
}
func (bt *batchTriangles) Draw() {
// need to apply transforms and mask color and picture bounds
trans := make(TrianglesData, bt.Len())
trans.Update(bt.Triangles)
for i := range trans {
bt.data.Update(bt.Triangles)
for i := range bt.data {
transPos := bt.batch.mat.Mul3x1(mgl32.Vec3{
float32(trans[i].Position.X()),
float32(trans[i].Position.Y()),
float32(bt.data[i].Position.X()),
float32(bt.data[i].Position.Y()),
1,
})
trans[i].Position = V(float64(transPos.X()), float64(transPos.Y()))
trans[i].Color = trans[i].Color.Mul(bt.batch.col)
bt.data[i].Position = V(float64(transPos.X()), float64(transPos.Y()))
bt.data[i].Color = bt.data[i].Color.Mul(bt.batch.col)
//TODO: texture
}
bt.trans.Update(&trans)
bt.trans.Update(&bt.data)
bt.batch.cont.Append(bt.trans)
}