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examples/triangles: Fix terms

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This commit is contained in:
Hajime Hoshi 2018-08-14 01:55:22 +09:00
parent 1b8cad4e1d
commit 7807488cc7
1 changed files with 14 additions and 14 deletions
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28
examples/triangles/main.go
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@ -43,8 +43,8 @@ func init() {
var ( var (
vertices []ebiten.Vertex vertices []ebiten.Vertex
numVerticesToDraw = 10 ngon = 10
prevNumVerticesToDraw = 0 prevNgon = 0
) )
func genVertices(num int) []ebiten.Vertex { func genVertices(num int) []ebiten.Vertex {
@ -106,21 +106,21 @@ func genVertices(num int) []ebiten.Vertex {
func update(screen *ebiten.Image) error { func update(screen *ebiten.Image) error {
if inpututil.IsKeyJustPressed(ebiten.KeyLeft) { if inpututil.IsKeyJustPressed(ebiten.KeyLeft) {
numVerticesToDraw-- ngon--
if numVerticesToDraw < 1 { if ngon < 1 {
numVerticesToDraw = 1 ngon = 1
} }
} }
if inpututil.IsKeyJustPressed(ebiten.KeyRight) { if inpututil.IsKeyJustPressed(ebiten.KeyRight) {
numVerticesToDraw++ ngon++
if numVerticesToDraw > 120 { if ngon > 120 {
numVerticesToDraw = 120 ngon = 120
} }
} }
if prevNumVerticesToDraw != numVerticesToDraw || len(vertices) == 0 { if prevNgon != ngon || len(vertices) == 0 {
vertices = genVertices(numVerticesToDraw) vertices = genVertices(ngon)
prevNumVerticesToDraw = numVerticesToDraw prevNgon = ngon
} }
if ebiten.IsDrawingSkipped() { if ebiten.IsDrawingSkipped() {
@ -129,12 +129,12 @@ func update(screen *ebiten.Image) error {
op := &ebiten.DrawTrianglesOptions{} op := &ebiten.DrawTrianglesOptions{}
indices := []uint16{} indices := []uint16{}
for i := 0; i < numVerticesToDraw; i++ { for i := 0; i < ngon; i++ {
indices = append(indices, uint16(i), uint16(i+1)%uint16(numVerticesToDraw), uint16(numVerticesToDraw)) indices = append(indices, uint16(i), uint16(i+1)%uint16(ngon), uint16(ngon))
} }
screen.DrawTriangles(vertices, indices, emptyImage, op) screen.DrawTriangles(vertices, indices, emptyImage, op)
msg := fmt.Sprintf("TPS: %0.2f\nVertices: %d\nPress <- or -> to change the number of the vertices", ebiten.CurrentTPS(), numVerticesToDraw) msg := fmt.Sprintf("TPS: %0.2f\n%d-gon\nPress <- or -> to change the number of the vertices", ebiten.CurrentTPS(), ngon)
ebitenutil.DebugPrint(screen, msg) ebitenutil.DebugPrint(screen, msg)
return nil return nil
} }