mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-19 21:02:18 +02:00
Refactoring: matrix initialization
This commit is contained in:
Hajime Hoshi
parent
c53695eb56
commit
ea98fefc4f
28
colorm.go
28
colorm.go
@ -21,16 +21,6 @@ import (
|
||||
// ColorMDim is a dimension of a ColorM.
|
||||
const ColorMDim = 5
|
||||
|
||||
var colorMI = ColorM{
|
||||
initialized: true,
|
||||
es: [ColorMDim - 1][ColorMDim]float64{
|
||||
{1, 0, 0, 0, 0},
|
||||
{0, 1, 0, 0, 0},
|
||||
{0, 0, 1, 0, 0},
|
||||
{0, 0, 0, 1, 0},
|
||||
},
|
||||
}
|
||||
|
||||
// A ColorM represents a matrix to transform coloring when rendering an image.
|
||||
//
|
||||
// A ColorM is applied to the source alpha color
|
||||
@ -48,6 +38,14 @@ func (c *ColorM) dim() int {
|
||||
return ColorMDim
|
||||
}
|
||||
|
||||
func (c *ColorM) initialize() {
|
||||
c.initialized = true
|
||||
c.es[0][0] = 1
|
||||
c.es[1][1] = 1
|
||||
c.es[2][2] = 1
|
||||
c.es[3][3] = 1
|
||||
}
|
||||
|
||||
// Element returns a value of a matrix at (i, j).
|
||||
func (c *ColorM) Element(i, j int) float64 {
|
||||
if !c.initialized {
|
||||
@ -62,7 +60,7 @@ func (c *ColorM) Element(i, j int) float64 {
|
||||
// Concat multiplies a color matrix with the other color matrix.
|
||||
func (c *ColorM) Concat(other ColorM) {
|
||||
if !c.initialized {
|
||||
*c = colorMI
|
||||
c.initialize()
|
||||
}
|
||||
result := ColorM{}
|
||||
mul(&other, c, &result)
|
||||
@ -72,7 +70,7 @@ func (c *ColorM) Concat(other ColorM) {
|
||||
// Add adds a color matrix with the other color matrix.
|
||||
func (c *ColorM) Add(other ColorM) {
|
||||
if !c.initialized {
|
||||
*c = colorMI
|
||||
c.initialize()
|
||||
}
|
||||
result := ColorM{}
|
||||
add(&other, c, &result)
|
||||
@ -81,7 +79,7 @@ func (c *ColorM) Add(other ColorM) {
|
||||
|
||||
func (c *ColorM) Scale(r, g, b, a float64) {
|
||||
if !c.initialized {
|
||||
*c = colorMI
|
||||
c.initialize()
|
||||
}
|
||||
for i := 0; i < ColorMDim; i++ {
|
||||
c.es[0][i] *= r
|
||||
@ -93,7 +91,7 @@ func (c *ColorM) Scale(r, g, b, a float64) {
|
||||
|
||||
func (c *ColorM) Translate(r, g, b, a float64) {
|
||||
if !c.initialized {
|
||||
*c = colorMI
|
||||
c.initialize()
|
||||
}
|
||||
c.es[0][4] += r
|
||||
c.es[1][4] += g
|
||||
@ -104,7 +102,7 @@ func (c *ColorM) Translate(r, g, b, a float64) {
|
||||
// SetElement sets an element at (i, j).
|
||||
func (c *ColorM) SetElement(i, j int, element float64) {
|
||||
if !c.initialized {
|
||||
*c = colorMI
|
||||
c.initialize()
|
||||
}
|
||||
c.es[i][j] = element
|
||||
}
|
||||
|
||||
@ -109,22 +109,24 @@ func (s *GameScene) drawBackground(r *ebiten.Image) error {
|
||||
}
|
||||
|
||||
w, h := imageGameBG.Size()
|
||||
geo := ebiten.TranslateGeo(-float64(w)/2, -float64(h)/2)
|
||||
var geo ebiten.GeoM
|
||||
geo.Translate(-float64(w)/2, -float64(h)/2)
|
||||
scaleW := ScreenWidth / float64(w)
|
||||
scaleH := ScreenHeight / float64(h)
|
||||
scale := scaleW
|
||||
if scale < scaleH {
|
||||
scale = scaleH
|
||||
}
|
||||
geo.Concat(ebiten.ScaleGeo(scale, scale))
|
||||
geo.Concat(ebiten.TranslateGeo(ScreenWidth/2, ScreenHeight/2))
|
||||
geo.Scale(scale, scale)
|
||||
geo.Translate(ScreenWidth/2, ScreenHeight/2)
|
||||
|
||||
a := 0.7
|
||||
m := ebiten.Monochrome()
|
||||
m.Concat(ebiten.ScaleColor(a, a, a, a))
|
||||
clr := ebiten.ScaleColor(1-a, 1-a, 1-a, 1-a)
|
||||
m.Scale(a, a, a, a)
|
||||
var clr ebiten.ColorM
|
||||
clr.Scale(1-a, 1-a, 1-a, 1-a)
|
||||
clr.Add(m)
|
||||
clr.Concat(ebiten.TranslateColor(0.3, 0.3, 0.3, 0))
|
||||
clr.Translate(0.3, 0.3, 0.3, 0)
|
||||
return r.DrawImage(imageGameBG, &ebiten.DrawImageOptions{
|
||||
GeoM: geo,
|
||||
ColorM: clr,
|
||||
|
||||
24
geom.go
24
geom.go
@ -21,14 +21,6 @@ import (
|
||||
// GeoMDim is a dimension of a GeoM.
|
||||
const GeoMDim = 3
|
||||
|
||||
var geoMI = GeoM{
|
||||
initialized: true,
|
||||
es: [2][3]float64{
|
||||
{1, 0, 0},
|
||||
{0, 1, 0},
|
||||
},
|
||||
}
|
||||
|
||||
// A GeoM represents a matrix to transform geometry when rendering an image.
|
||||
//
|
||||
// The initial value is identity.
|
||||
@ -41,6 +33,12 @@ func (g *GeoM) dim() int {
|
||||
return GeoMDim
|
||||
}
|
||||
|
||||
func (g *GeoM) initialize() {
|
||||
g.initialized = true
|
||||
g.es[0][0] = 1
|
||||
g.es[1][1] = 1
|
||||
}
|
||||
|
||||
// Element returns a value of a matrix at (i, j).
|
||||
func (g *GeoM) Element(i, j int) float64 {
|
||||
if !g.initialized {
|
||||
@ -55,7 +53,7 @@ func (g *GeoM) Element(i, j int) float64 {
|
||||
// Concat multiplies a geometry matrix with the other geometry matrix.
|
||||
func (g *GeoM) Concat(other GeoM) {
|
||||
if !g.initialized {
|
||||
*g = geoMI
|
||||
g.initialize()
|
||||
}
|
||||
result := GeoM{}
|
||||
mul(&other, g, &result)
|
||||
@ -65,7 +63,7 @@ func (g *GeoM) Concat(other GeoM) {
|
||||
// Add adds a geometry matrix with the other geometry matrix.
|
||||
func (g *GeoM) Add(other GeoM) {
|
||||
if !g.initialized {
|
||||
*g = geoMI
|
||||
g.initialize()
|
||||
}
|
||||
result := GeoM{}
|
||||
add(&other, g, &result)
|
||||
@ -74,7 +72,7 @@ func (g *GeoM) Add(other GeoM) {
|
||||
|
||||
func (g *GeoM) Scale(x, y float64) {
|
||||
if !g.initialized {
|
||||
*g = geoMI
|
||||
g.initialize()
|
||||
}
|
||||
for i := 0; i < GeoMDim; i++ {
|
||||
g.es[0][i] *= x
|
||||
@ -84,7 +82,7 @@ func (g *GeoM) Scale(x, y float64) {
|
||||
|
||||
func (g *GeoM) Translate(tx, ty float64) {
|
||||
if !g.initialized {
|
||||
*g = geoMI
|
||||
g.initialize()
|
||||
}
|
||||
g.es[0][2] += tx
|
||||
g.es[1][2] += ty
|
||||
@ -93,7 +91,7 @@ func (g *GeoM) Translate(tx, ty float64) {
|
||||
// SetElement sets an element at (i, j).
|
||||
func (g *GeoM) SetElement(i, j int, element float64) {
|
||||
if !g.initialized {
|
||||
*g = geoMI
|
||||
g.initialize()
|
||||
}
|
||||
g.es[i][j] = element
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user