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Begin to work on matrix transformation (does not yet really work)

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This commit is contained in:
legoff.laurent 2010-11-25 17:54:56 +00:00
parent 2d02464b73
commit ae9b990671
1 changed files with 5 additions and 7 deletions
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12
draw2d/src/pkg/draw2d/draw2d.go
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@ -91,18 +91,15 @@ func (gc *GraphicContext) Rotate(angle float) {
} }
func (gc *GraphicContext) Translate(tx, ty float) { func (gc *GraphicContext) Translate(tx, ty float) {
ox, oy := gc.current.path.LastPoint() tr := NewTranslationMatrix(tx, ty)
tr := NewTranslationMatrix(ox, oy) gc.current.tr.Compose(tr)
tr2 := NewTranslationMatrix(tx, ty)
tr1 := tr.GetInverseTransformation()
gc.current.tr.Compose(tr).Compose(tr2).Compose(tr1)
} }
func (gc *GraphicContext) Scale(sx, sy float) { func (gc *GraphicContext) Scale(sx, sy float) {
ox, oy := gc.current.path.LastPoint() ox, oy := gc.current.path.LastPoint()
tr := NewTranslationMatrix(ox, oy) tr := NewTranslationMatrix(ox, oy)
tr2 := NewScaleMatrix(sx, sy) tr2 := NewScaleMatrix(sx, sy)
tr1 := tr.GetInverseTransformation() tr1 := tr.GetInverseTransformation()
gc.current.tr.Compose(tr).Compose(tr2).Compose(tr1) gc.current.tr.Compose(tr).Compose(tr2).Compose(tr1)
} }
@ -156,6 +153,7 @@ func (gc *GraphicContext) Save() {
context.cap = gc.current.cap context.cap = gc.current.cap
context.join = gc.current.join context.join = gc.current.join
context.path = gc.current.path.Copy() context.path = gc.current.path.Copy()
copy(context.tr[:], gc.current.tr[:])
context.previous = gc.current context.previous = gc.current
gc.current = context gc.current = context
} }
@ -234,7 +232,7 @@ func (gc *GraphicContext) RArcTo(dcx, dcy, rx, ry, startAngle, angle float) {
gc.current.path.RArcTo(dcx, dcy, rx, ry, startAngle, angle) gc.current.path.RArcTo(dcx, dcy, rx, ry, startAngle, angle)
} }
func (gc *GraphicContext) Close() { func (gc *GraphicContext) ClosePath() {
gc.current.path.Close() gc.current.path.Close()
} }