diff --git a/examples/glut/main.go b/examples/glut/main.go index 276c93711..451616dfc 100644 --- a/examples/glut/main.go +++ b/examples/glut/main.go @@ -17,6 +17,7 @@ import "C" import ( "github.com/hajimehoshi/go.ebiten" "github.com/hajimehoshi/go.ebiten/graphics" + "github.com/hajimehoshi/go.ebiten/graphics/matrix" "image" "image/color" _ "image/png" @@ -116,16 +117,17 @@ func (game *DemoGame) Update() { func (game *DemoGame) Draw(g graphics.GraphicsContext, offscreen graphics.TextureID) { g.Fill(&color.RGBA{R: 128, G: 128, B: 255, A: 255}) - geometryMatrix := graphics.IdentityGeometryMatrix() + + geometryMatrix := matrix.IdentityGeometry() tx, ty := float64(game.ebitenTexture.Width), float64(game.ebitenTexture.Height) - geometryMatrix = geometryMatrix.Concat(graphics.TranslateMatrix(-tx/2, -ty/2)) - geometryMatrix = geometryMatrix.Concat(graphics.RotateMatrix(float64(game.x) / 60)) - geometryMatrix = geometryMatrix.Concat(graphics.TranslateMatrix(tx/2, ty/2)) - geometryMatrix = geometryMatrix.Concat(graphics.TranslateMatrix(100, 100)) + geometryMatrix.Translate(-tx/2, -ty/2) + geometryMatrix.Rotate(float64(game.x) / 60) + geometryMatrix.Translate(tx/2, ty/2) + geometryMatrix.Translate(100, 100) g.DrawTexture(game.ebitenTexture.ID, 0, 0, int(tx), int(ty), geometryMatrix, - graphics.IdentityColorMatrix()) + matrix.IdentityColor()) } func main() { diff --git a/graphics/affine_matrix.go b/graphics/affine_matrix.go deleted file mode 100644 index d2467b550..000000000 --- a/graphics/affine_matrix.go +++ /dev/null @@ -1,112 +0,0 @@ -package graphics - -type affineMatrixElement float64 - -type AffineMatrix struct { - elements []affineMatrixElement - dimension int -} - -func NewAffineMatrix(dimension int) *AffineMatrix { - if dimension < 0 { - panic("invalid dimension") - } - matrix := &AffineMatrix{} - elementsNumber := dimension * (dimension - 1) - matrix.elements = make([]affineMatrixElement, elementsNumber) - matrix.dimension = dimension - return matrix -} - -func IdentityAffineMatrix(dimension int) *AffineMatrix { - if dimension < 0 { - panic("invalid dimension") - } - matrix := NewAffineMatrix(dimension) - for i := 0; i < dimension-1; i++ { - for j := 0; j < dimension; j++ { - if i == j { - matrix.elements[i*dimension+j] = 1 - } else { - matrix.elements[i*dimension+j] = 0 - } - } - } - return matrix -} - -func (matrix *AffineMatrix) Clone() *AffineMatrix { - result := NewAffineMatrix(matrix.dimension) - copy(result.elements, matrix.elements) - return result -} - -func (matrix *AffineMatrix) Element(i, j int) float64 { - dimension := matrix.dimension - if i < 0 || dimension <= i { - panic("out of range index i") - } - if j < 0 || dimension <= j { - panic("out of range index j") - } - if i == dimension-1 { - if j == dimension-1 { - return 1 - } - return 0 - } - return float64(matrix.elements[i*dimension+j]) -} - -func (matrix *AffineMatrix) SetElement(i, j int, element float64) { - dimension := matrix.dimension - if i < 0 || dimension-1 <= i { - panic("out of range index i") - } - if j < 0 || dimension <= j { - panic("out of range index j") - } - matrix.elements[i*dimension+j] = affineMatrixElement(element) -} - -func (matrix *AffineMatrix) IsIdentity() bool { - dimension := matrix.dimension - for i := 0; i < dimension-1; i++ { - for j := 0; j < dimension; j++ { - element := matrix.elements[i*dimension+j] - if i == j && element != 1 { - return false - } else if i != j && element != 0 { - return false - } - } - } - return true -} - -/* - * TODO: The arguments' names are strange even though they are not wrong. - */ -func (rhs *AffineMatrix) Concat(lhs *AffineMatrix) *AffineMatrix { - dimension := lhs.dimension - if dimension != rhs.dimension { - panic("diffrent-sized matrices can't be concatenated") - } - result := NewAffineMatrix(dimension) - - for i := 0; i < dimension-1; i++ { - for j := 0; j < dimension; j++ { - element := affineMatrixElement(0.0) - for k := 0; k < dimension-1; k++ { - element += lhs.elements[i*dimension+k] * - rhs.elements[k*dimension+j] - } - if j == dimension-1 { - element += lhs.elements[i*dimension+dimension-1] - } - result.elements[i*dimension+j] = element - } - } - - return result -} diff --git a/graphics/affine_matrix_test.go b/graphics/affine_matrix_test.go deleted file mode 100644 index 82bb1edb8..000000000 --- a/graphics/affine_matrix_test.go +++ /dev/null @@ -1,179 +0,0 @@ -package graphics_test - -import ( - . "." - "testing" -) - -func setElements(matrix *AffineMatrix, elements [][]float64) { - dimension := len(elements) + 1 - for i := 0; i < dimension-1; i++ { - for j := 0; j < dimension; j++ { - matrix.SetElement(i, j, elements[i][j]) - } - } -} - -func TestAffineMatrixElement(t *testing.T) { - matrix := NewAffineMatrix(4) - matrix.SetElement(0, 0, 1) - matrix.SetElement(0, 1, 2) - matrix.SetElement(0, 2, 3) - expected := [][]float64{ - {1, 2, 3, 0}, - {0, 0, 0, 0}, - {0, 0, 0, 0}, - {0, 0, 0, 1}, - } - for i := 0; i < 4; i++ { - for j := 0; j < 4; j++ { - got := matrix.Element(i, j) - want := expected[i][j] - if want != got { - t.Errorf("matrix.Element(%d, %d) = %f, want %f", - i, j, got, want) - } - } - } - - matrix.SetElement(1, 0, 4) - matrix.SetElement(1, 1, 5) - matrix.SetElement(2, 3, 6) - expected = [][]float64{ - {1, 2, 3, 0}, - {4, 5, 0, 0}, - {0, 0, 0, 6}, - {0, 0, 0, 1}, - } - for i := 0; i < 4; i++ { - for j := 0; j < 4; j++ { - got := matrix.Element(i, j) - want := expected[i][j] - if want != got { - t.Errorf("matrix.Element(%d, %d) = %f, want %f", - i, j, got, want) - } - } - } -} - -func TestAffineMatrixIsIdentity(t *testing.T) { - matrix := NewAffineMatrix(4) - matrix.SetElement(0, 0, 1) - matrix.SetElement(1, 1, 1) - matrix.SetElement(2, 2, 1) - got := matrix.IsIdentity() - want := true - if want != got { - t.Errorf("matrix.IsIdentity() = %t, want %t", got, want) - } - - matrix2 := matrix.Clone() - got = matrix2.IsIdentity() - want = true - if want != got { - t.Errorf("matrix2.IsIdentity() = %t, want %t", got, want) - } - - matrix2.SetElement(0, 1, 1) - got = matrix2.IsIdentity() - want = false - if want != got { - t.Errorf("matrix2.IsIdentity() = %t, want %t", got, want) - } -} - -func TestAffineMatrixConcat(t *testing.T) { - matrix1 := IdentityAffineMatrix(3) - matrix2 := IdentityAffineMatrix(3) - setElements(matrix1, [][]float64{ - {2, 0, 0}, - {0, 2, 0}, - }) - setElements(matrix2, [][]float64{ - {1, 0, 1}, - {0, 1, 1}, - }) - - // TODO: 'matrix1x2' may not be a good name. - matrix1x2 := matrix1.Concat(matrix2) - expected := [][]float64{ - {2, 0, 1}, - {0, 2, 1}, - {0, 0, 1}, - } - for i := 0; i < 3; i++ { - for j := 0; j < 3; j++ { - got := matrix1x2.Element(i, j) - want := expected[i][j] - if want != got { - t.Errorf("matrix1x2.Element(%d, %d) = %f, want %f", - i, j, got, want) - } - } - } - - matrix2x1 := matrix2.Concat(matrix1) - expected = [][]float64{ - {2, 0, 2}, - {0, 2, 2}, - {0, 0, 1}, - } - for i := 0; i < 3; i++ { - for j := 0; j < 3; j++ { - got := matrix2x1.Element(i, j) - want := expected[i][j] - if want != got { - t.Errorf("matrix2x1.Element(%d, %d) = %f, want %f", - i, j, got, want) - } - } - } - - matrix3 := NewAffineMatrix(4) - matrix4 := NewAffineMatrix(4) - setElements(matrix3, [][]float64{ - {1, 2, 3, 4}, - {5, 6, 7, 8}, - {9, 10, 11, 12}, - }) - setElements(matrix4, [][]float64{ - {13, 14, 15, 16}, - {17, 18, 19, 20}, - {21, 22, 23, 24}, - }) - - matrix3x4 := matrix3.Concat(matrix4) - expected = [][]float64{ - {218, 260, 302, 360}, - {278, 332, 386, 460}, - {338, 404, 470, 560}, - {0, 0, 0, 1}} - for i := 0; i < 4; i++ { - for j := 0; j < 4; j++ { - got := matrix3x4.Element(i, j) - want := expected[i][j] - if want != got { - t.Errorf("matrix3x4.Element(%d, %d) = %f, want %f", - i, j, got, want) - } - } - } - - matrix4x3 := matrix4.Concat(matrix3) - expected = [][]float64{ - {110, 116, 122, 132}, - {314, 332, 350, 376}, - {518, 548, 578, 620}, - {0, 0, 0, 1}} - for i := 0; i < 4; i++ { - for j := 0; j < 4; j++ { - got := matrix4x3.Element(i, j) - want := expected[i][j] - if want != got { - t.Errorf("matrix4x3.Element(%d, %d) = %f, want %f", - i, j, got, want) - } - } - } -} diff --git a/graphics/color_matrix.go b/graphics/color_matrix.go deleted file mode 100644 index 7ddd1513f..000000000 --- a/graphics/color_matrix.go +++ /dev/null @@ -1,23 +0,0 @@ -package graphics - -type ColorMatrix struct { - AffineMatrix -} - -const colorMatrixDimension = 5 - -func NewColorMatrix() *ColorMatrix { - return &ColorMatrix{*NewAffineMatrix(colorMatrixDimension)} -} - -func IdentityColorMatrix() *ColorMatrix { - return &ColorMatrix{*IdentityAffineMatrix(colorMatrixDimension)} -} - -func (matrix *ColorMatrix) Concat(other *ColorMatrix) *ColorMatrix { - return &ColorMatrix{*matrix.AffineMatrix.Concat(&other.AffineMatrix)} -} - -func (matrix *ColorMatrix) Clone() *ColorMatrix { - return &ColorMatrix{*(matrix.AffineMatrix.Clone())} -} diff --git a/graphics/geometry_matrix.go b/graphics/geometry_matrix.go deleted file mode 100644 index 60f61ed22..000000000 --- a/graphics/geometry_matrix.go +++ /dev/null @@ -1,92 +0,0 @@ -package graphics - -import ( - "math" -) - -type GeometryMatrix struct { - AffineMatrix -} - -const geometryMatrixDimension = 3 - -func NewGeometryMatrix() *GeometryMatrix { - return &GeometryMatrix{*NewAffineMatrix(geometryMatrixDimension)} -} - -func IdentityGeometryMatrix() *GeometryMatrix { - return &GeometryMatrix{*IdentityAffineMatrix(geometryMatrixDimension)} -} - -func TranslateMatrix(tx, ty float64) *GeometryMatrix { - matrix := IdentityGeometryMatrix() - matrix.SetTx(tx) - matrix.SetTy(ty) - return matrix -} - -func RotateMatrix(theta float64) *GeometryMatrix { - matrix := NewGeometryMatrix() - cos, sin := math.Cos(theta), math.Sin(theta) - matrix.SetA(cos) - matrix.SetB(-sin) - matrix.SetC(sin) - matrix.SetD(cos) - return matrix -} - -func (matrix *GeometryMatrix) Concat(other *GeometryMatrix) *GeometryMatrix { - return &GeometryMatrix{*matrix.AffineMatrix.Concat(&other.AffineMatrix)} -} - -func (matrix *GeometryMatrix) Clone() *GeometryMatrix { - return &GeometryMatrix{*(matrix.AffineMatrix.Clone())} -} - -func (matrix *GeometryMatrix) A() float64 { - return matrix.Element(0, 0) -} - -func (matrix *GeometryMatrix) B() float64 { - return matrix.Element(0, 1) -} - -func (matrix *GeometryMatrix) C() float64 { - return matrix.Element(1, 0) -} - -func (matrix *GeometryMatrix) D() float64 { - return matrix.Element(1, 1) -} - -func (matrix *GeometryMatrix) Tx() float64 { - return matrix.Element(0, 2) -} - -func (matrix *GeometryMatrix) Ty() float64 { - return matrix.Element(1, 2) -} - -func (matrix *GeometryMatrix) SetA(a float64) { - matrix.SetElement(0, 0, a) -} - -func (matrix *GeometryMatrix) SetB(b float64) { - matrix.SetElement(0, 1, b) -} - -func (matrix *GeometryMatrix) SetC(c float64) { - matrix.SetElement(1, 0, c) -} - -func (matrix *GeometryMatrix) SetD(d float64) { - matrix.SetElement(1, 1, d) -} - -func (matrix *GeometryMatrix) SetTx(tx float64) { - matrix.SetElement(0, 2, tx) -} - -func (matrix *GeometryMatrix) SetTy(ty float64) { - matrix.SetElement(1, 2, ty) -} diff --git a/graphics/geometry_matrix_test.go b/graphics/geometry_matrix_test.go deleted file mode 100644 index 8f737e10f..000000000 --- a/graphics/geometry_matrix_test.go +++ /dev/null @@ -1,61 +0,0 @@ -package graphics_test - -import ( - . "." - "testing" -) - -func TestGeometryMatrixElements(t *testing.T) { - matrix := NewGeometryMatrix() - matrix.SetA(1) - matrix.SetB(2) - matrix.SetC(3) - matrix.SetD(4) - matrix.SetTx(5) - matrix.SetTy(6) - - got := matrix.A() - want := float64(1) - if want != got { - t.Errorf("matrix.A() = %f, want %f", got, want) - } - - got = matrix.B() - want = float64(2) - if want != got { - t.Errorf("matrix.B() = %f, want %f", got, want) - } - - got = matrix.C() - want = float64(3) - if want != got { - t.Errorf("matrix.C() = %f, want %f", got, want) - } - - got = matrix.D() - want = float64(4) - if want != got { - t.Errorf("matrix.D() = %f, want %f", got, want) - } - - got = matrix.Tx() - want = float64(5) - if want != got { - t.Errorf("matrix.Tx() = %f, want %f", got, want) - } - - got = matrix.Ty() - want = float64(6) - if want != got { - t.Errorf("matrix.Ty() = %f, want %f", got, want) - } -} - -func TestGeometryIdentity(t *testing.T) { - matrix := IdentityGeometryMatrix() - got := matrix.IsIdentity() - want := true - if want != got { - t.Errorf("matrix.IsIdentity() = %t, want %t", got, want) - } -} diff --git a/graphics/graphics.go b/graphics/graphics.go index b0be06b32..3e954cd59 100644 --- a/graphics/graphics.go +++ b/graphics/graphics.go @@ -1,6 +1,7 @@ package graphics import ( + "github.com/hajimehoshi/go.ebiten/graphics/matrix" "image" "image/color" ) @@ -15,7 +16,7 @@ type GraphicsContext interface { Fill(color color.Color) DrawTexture(textureId TextureID, srcX, srcY, srcWidth, srcHeight int, - geometryMatrix *GeometryMatrix, colorMatrix *ColorMatrix) + geometryMatrix matrix.Geometry, colorMatrix matrix.Color) SetOffscreen(textureId TextureID) } diff --git a/graphics/matrix/affine.go b/graphics/matrix/affine.go new file mode 100644 index 000000000..b83541c2d --- /dev/null +++ b/graphics/matrix/affine.go @@ -0,0 +1,43 @@ +package matrix + +type Affine interface { + Dim() int + element(i, j int) float64 + setElement(i, j int, element float64) +} + +func isIdentity(matrix Affine) bool { + dim := matrix.Dim() + for i := 0; i < dim-1; i++ { + for j := 0; j < dim; j++ { + element := matrix.element(i, j) + if i == j && element != 1 { + return false + } else if i != j && element != 0 { + return false + } + } + } + return true +} + +func mul(lhs, rhs, result Affine) { + dim := lhs.Dim() + if dim != rhs.Dim() { + panic("diffrent-sized matrices can't be multiplied") + } + + for i := 0; i < dim-1; i++ { + for j := 0; j < dim; j++ { + element := float64(0) + for k := 0; k < dim-1; k++ { + element += lhs.element(i, k) * + rhs.element(k, j) + } + if j == dim-1 { + element += lhs.element(i, j) + } + result.setElement(i, j, element) + } + } +} diff --git a/graphics/matrix/affine_test.go b/graphics/matrix/affine_test.go new file mode 100644 index 000000000..cff4f3a3e --- /dev/null +++ b/graphics/matrix/affine_test.go @@ -0,0 +1,3 @@ +package matrix_test + + diff --git a/graphics/matrix/color.go b/graphics/matrix/color.go new file mode 100644 index 000000000..5e4bc85b6 --- /dev/null +++ b/graphics/matrix/color.go @@ -0,0 +1,40 @@ +package matrix + +const colorDim = 5 + +type Color struct { + Elements [colorDim - 1][colorDim]float64 +} + +func IdentityColor() Color { + return Color{ + [colorDim - 1][colorDim]float64{ + {1, 0, 0, 0, 0}, + {0, 1, 0, 0, 0}, + {0, 0, 1, 0, 0}, + {0, 0, 0, 1, 0}, + }, + } +} + +func (matrix *Color) Dim() int { + return colorDim +} + +func (matrix *Color) Concat(other Color) { + result := Color{} + mul(&other, matrix, &result) + *matrix = result +} + +func (matrix *Color) IsIdentity() bool { + return isIdentity(matrix) +} + +func (matrix *Color) element(i, j int) float64 { + return matrix.Elements[i][j] +} + +func (matrix *Color) setElement(i, j int, element float64) { + matrix.Elements[i][j] = element +} diff --git a/graphics/matrix/color_test.go b/graphics/matrix/color_test.go new file mode 100644 index 000000000..9ae48c36c --- /dev/null +++ b/graphics/matrix/color_test.go @@ -0,0 +1,15 @@ +package matrix_test + +import ( + . "." + "testing" +) + +func TestColorIdentity(t *testing.T) { + matrix := IdentityColor() + got := matrix.IsIdentity() + want := true + if want != got { + t.Errorf("matrix.IsIdentity() = %t, want %t", got, want) + } +} diff --git a/graphics/matrix/geometry.go b/graphics/matrix/geometry.go new file mode 100644 index 000000000..c5808f4a6 --- /dev/null +++ b/graphics/matrix/geometry.go @@ -0,0 +1,59 @@ +package matrix + +import ( + "math" +) + +const geometryDim = 3 + +type Geometry struct { + Elements [geometryDim - 1][geometryDim]float64 +} + +func IdentityGeometry() Geometry { + return Geometry{ + [geometryDim - 1][geometryDim]float64{ + {1, 0, 0}, + {0, 1, 0}, + }, + } +} + +func (matrix *Geometry) Dim() int { + return geometryDim +} + +func (matrix *Geometry) Concat(other Geometry) { + result := Geometry{} + mul(&other, matrix, &result) + *matrix = result +} + +func (matrix *Geometry) IsIdentity() bool { + return isIdentity(matrix) +} + +func (matrix *Geometry) element(i, j int) float64 { + return matrix.Elements[i][j] +} + +func (matrix *Geometry) setElement(i, j int, element float64) { + matrix.Elements[i][j] = element +} + +func (matrix *Geometry) Translate(tx, ty float64) { + matrix.Elements[0][2] += tx + matrix.Elements[1][2] += ty +} + +func (matrix *Geometry) Rotate(theta float64) { + cos := math.Cos(theta) + sin := math.Sin(theta) + rotate := Geometry{ + [2][3]float64{ + {cos, -sin, 0}, + {sin, cos, 0}, + }, + } + matrix.Concat(rotate) +} diff --git a/graphics/matrix/geometry_test.go b/graphics/matrix/geometry_test.go new file mode 100644 index 000000000..dde4101a4 --- /dev/null +++ b/graphics/matrix/geometry_test.go @@ -0,0 +1,63 @@ +package matrix_test + +import ( + . "." + "testing" +) + +func TestGeometryIdentity(t *testing.T) { + matrix := IdentityGeometry() + got := matrix.IsIdentity() + want := true + if want != got { + t.Errorf("matrix.IsIdentity() = %t, want %t", got, want) + } +} + +func TestGeometryConcat(t *testing.T) { + matrix1 := Geometry{} + matrix2 := Geometry{} + matrix1.Elements = [2][3]float64{ + {2, 0, 0}, + {0, 2, 0}, + } + matrix2.Elements = [2][3]float64{ + {1, 0, 1}, + {0, 1, 1}, + } + + // TODO: 'matrix1x2' may not be a good name. + matrix1x2 := matrix1 + matrix1x2.Concat(matrix2) + expected := [][]float64{ + {2, 0, 1}, + {0, 2, 1}, + } + for i := 0; i < 2; i++ { + for j := 0; j < 3; j++ { + got := matrix1x2.Elements[i][j] + want := expected[i][j] + if want != got { + t.Errorf("matrix1x2.Element(%d, %d) = %f, want %f", + i, j, got, want) + } + } + } + + matrix2x1 := matrix2 + matrix2x1.Concat(matrix1) + expected = [][]float64{ + {2, 0, 2}, + {0, 2, 2}, + } + for i := 0; i < 2; i++ { + for j := 0; j < 3; j++ { + got := matrix2x1.Elements[i][j] + want := expected[i][j] + if want != got { + t.Errorf("matrix2x1.Element(%d, %d) = %f, want %f", + i, j, got, want) + } + } + } +} diff --git a/graphics/opengl/device.go b/graphics/opengl/device.go index 9317a57e3..a3d7aaf92 100644 --- a/graphics/opengl/device.go +++ b/graphics/opengl/device.go @@ -7,6 +7,7 @@ package opengl import "C" import ( "github.com/hajimehoshi/go.ebiten/graphics" + "github.com/hajimehoshi/go.ebiten/graphics/matrix" ) type Device struct { @@ -46,12 +47,17 @@ func (device *Device) Update() { C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MAG_FILTER, C.GL_LINEAR) g.resetOffscreen() g.Clear() - geometryMatrix := graphics.IdentityGeometryMatrix() - geometryMatrix.SetA(float64(g.screenScale)) - geometryMatrix.SetD(float64(g.screenScale)) + + scale := float64(g.screenScale) + geometryMatrix := matrix.Geometry{ + [2][3]float64{ + {scale, 0, 0}, + {0, scale, 0}, + }, + } g.DrawTexture(device.offscreenTexture.ID, 0, 0, device.screenWidth, device.screenHeight, - geometryMatrix, graphics.IdentityColorMatrix()) + geometryMatrix, matrix.IdentityColor()) g.flush() } diff --git a/graphics/opengl/graphics_context.go b/graphics/opengl/graphics_context.go index 854296b85..c4f36e8fe 100644 --- a/graphics/opengl/graphics_context.go +++ b/graphics/opengl/graphics_context.go @@ -8,6 +8,7 @@ import "C" import ( "fmt" "github.com/hajimehoshi/go.ebiten/graphics" + "github.com/hajimehoshi/go.ebiten/graphics/matrix" "image" "image/color" "unsafe" @@ -67,9 +68,7 @@ func (context *GraphicsContext) DrawRect(x, y, width, height int, clr color.Colo func (context *GraphicsContext) DrawTexture( textureID graphics.TextureID, srcX, srcY, srcWidth, srcHeight int, - geometryMatrix *graphics.GeometryMatrix, colorMatrix *graphics.ColorMatrix) { - geometryMatrix = geometryMatrix.Clone() - colorMatrix = colorMatrix.Clone() + geometryMatrix matrix.Geometry, colorMatrix matrix.Color) { texture := context.textures[textureID] @@ -180,7 +179,7 @@ func (context *GraphicsContext) flush() { // This method should be called on the UI thread. func (context *GraphicsContext) setShaderProgram( - geometryMatrix *graphics.GeometryMatrix, colorMatrix *graphics.ColorMatrix) { + geometryMatrix matrix.Geometry, colorMatrix matrix.Color) { program := C.GLuint(0) if colorMatrix.IsIdentity() { program = regularShaderProgram @@ -195,12 +194,12 @@ func (context *GraphicsContext) setShaderProgram( 1, C.GL_FALSE, (*C.GLfloat)(&context.projectionMatrix[0])) - a := float32(geometryMatrix.A()) - b := float32(geometryMatrix.B()) - c := float32(geometryMatrix.C()) - d := float32(geometryMatrix.D()) - tx := float32(geometryMatrix.Tx()) - ty := float32(geometryMatrix.Ty()) + a := float32(geometryMatrix.Elements[0][0]) + b := float32(geometryMatrix.Elements[0][1]) + c := float32(geometryMatrix.Elements[1][0]) + d := float32(geometryMatrix.Elements[1][1]) + tx := float32(geometryMatrix.Elements[0][2]) + ty := float32(geometryMatrix.Elements[1][2]) glModelviewMatrix := [...]float32{ a, c, 0, 0, b, d, 0, 0, @@ -220,7 +219,7 @@ func (context *GraphicsContext) setShaderProgram( e := [4][5]float32{} for i := 0; i < 4; i++ { for j := 0; j < 5; j++ { - e[i][j] = float32(colorMatrix.Element(i, j)) + e[i][j] = float32(colorMatrix.Elements[i][j]) } }