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shapes.go
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/*
To the extent possible under law, Ian Davis has waived all copyright
and related or neighboring rights to this Amberfell Source Code file.
This work is published from the United Kingdom.
*/
package main
import (
// "fmt"
"github.com/banthar/gl"
"image"
_ "image/png"
"os"
)
type Vertex struct {
p [3]float32 // Position
t [2]float32 // Texture coordinate
n [3]float32 // Normal
c [4]float32 // Colour
e [4]float32 // Emissive light
}
type TriangleIndex struct {
i1 uint32
i2 uint32
i3 uint32
}
type VertexBuffer struct {
vertices []Vertex
indices []TriangleIndex
vertexCount int
indexCount int
texture *gl.Texture
}
func NewVertexBuffer(capacity uint32, texture *gl.Texture) *VertexBuffer {
var v VertexBuffer
v.vertices = make([]Vertex, capacity, capacity)
v.indices = make([]TriangleIndex, capacity, capacity)
v.texture = texture
return &v
}
func (self *VertexBuffer) Reset() {
self.vertexCount = 0
self.indexCount = 0
}
func (self *VertexBuffer) AddFace(face uint8, texture uint16, selected bool, shade int, damaged bool, x1, y1, z1, tx1, ty1, x2, y2, z2, tx2, ty2 float32) {
if self.vertexCount >= cap(self.vertices)-4 {
// TODO: log a warning about overflowing buffer
return
}
c := COLOURS[shade]
if selected {
c = COLOUR_HIGH
}
pos := Vectorf{float64(x1), float64(y1), float64(z1)}
e := LightLevel(pos, NORMALS[face])
vc := self.vertexCount
if x1 == x2 {
self.vertices[vc] = Vertex{p: [3]float32{x1, y1, z1}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+1] = Vertex{p: [3]float32{x1, y1, z2}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+2] = Vertex{p: [3]float32{x1, y2, z2}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+3] = Vertex{p: [3]float32{x1, y2, z1}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
} else if y1 == y2 {
self.vertices[vc] = Vertex{p: [3]float32{x1, y1, z1}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+1] = Vertex{p: [3]float32{x1, y1, z2}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+2] = Vertex{p: [3]float32{x2, y1, z2}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+3] = Vertex{p: [3]float32{x2, y1, z1}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
} else {
self.vertices[vc] = Vertex{p: [3]float32{x1, y1, z1}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+1] = Vertex{p: [3]float32{x1, y2, z1}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+2] = Vertex{p: [3]float32{x2, y2, z1}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+3] = Vertex{p: [3]float32{x2, y1, z1}, t: [2]float32{(float32((texture % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((texture / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
}
self.vertexCount += 4
ic := self.indexCount
self.indices[ic] = TriangleIndex{uint32(vc), uint32(vc) + 1, uint32(vc) + 2}
self.indices[ic+1] = TriangleIndex{uint32(vc) + 2, uint32(vc) + 3, uint32(vc)}
self.indexCount += 2
if damaged {
c = COLOUR_CRACKS
vc += 4
x1 += 0.004 * NORMALS[face][XAXIS]
x2 += 0.004 * NORMALS[face][XAXIS]
y1 += 0.004 * NORMALS[face][YAXIS]
y2 += 0.004 * NORMALS[face][YAXIS]
z1 += 0.004 * NORMALS[face][ZAXIS]
z2 += 0.004 * NORMALS[face][ZAXIS]
if x1 == x2 {
self.vertices[vc] = Vertex{p: [3]float32{x1, y1, z1}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+1] = Vertex{p: [3]float32{x1, y1, z2}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+2] = Vertex{p: [3]float32{x1, y2, z2}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+3] = Vertex{p: [3]float32{x1, y2, z1}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
} else if y1 == y2 {
self.vertices[vc] = Vertex{p: [3]float32{x1, y1, z1}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+1] = Vertex{p: [3]float32{x1, y1, z2}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+2] = Vertex{p: [3]float32{x2, y1, z2}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+3] = Vertex{p: [3]float32{x2, y1, z1}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
} else {
self.vertices[vc] = Vertex{p: [3]float32{x1, y1, z1}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+1] = Vertex{p: [3]float32{x1, y2, z1}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx1) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+2] = Vertex{p: [3]float32{x2, y2, z1}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty2) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
self.vertices[vc+3] = Vertex{p: [3]float32{x2, y1, z1}, t: [2]float32{(float32((TEXTURE_CRACKS % TILES_HORZ)) + tx2) / TILES_HORZ, (float32((TEXTURE_CRACKS / TILES_HORZ)) + ty1) / TILES_VERT}, n: NORMALS[face], c: c, e: e}
}
self.vertexCount += 4
ic := self.indexCount
self.indices[ic] = TriangleIndex{uint32(vc), uint32(vc) + 1, uint32(vc) + 2}
self.indices[ic+1] = TriangleIndex{uint32(vc) + 2, uint32(vc) + 3, uint32(vc)}
self.indexCount += 2
}
}
func (self *VertexBuffer) RenderDirect(clip bool) {
self.texture.Bind(gl.TEXTURE_2D)
if clip {
cutoff := float32(-0.00006) // magic!
planes32 := viewport.ClipPlanes()
gl.Begin(gl.QUADS)
for i := 0; i < self.vertexCount; i += 4 {
draw := true
// Cull back faces
// Use dot product of front viewport plane with normal of face
dot := planes32[5][0]*self.vertices[i].n[0] + planes32[5][1]*self.vertices[i].n[1] + planes32[5][2]*self.vertices[i].n[2]
if dot <= 0 {
draw = false
} else {
for p := 0; p < 6; p++ {
dist1 := planes32[p][0]*self.vertices[i].p[0] + planes32[p][1]*self.vertices[i].p[1] + planes32[p][2]*self.vertices[i+1].p[2] + planes32[p][3]
dist2 := planes32[p][0]*self.vertices[i+1].p[0] + planes32[p][1]*self.vertices[i+2].p[1] + planes32[p][2]*self.vertices[i+2].p[2] + planes32[p][3]
dist3 := planes32[p][0]*self.vertices[i+2].p[0] + planes32[p][1]*self.vertices[i+3].p[1] + planes32[p][2]*self.vertices[i+3].p[2] + planes32[p][3]
dist4 := planes32[p][0]*self.vertices[i+3].p[0] + planes32[p][1]*self.vertices[i+4].p[1] + planes32[p][2]*self.vertices[i+4].p[2] + planes32[p][3]
if dist1 <= cutoff && dist2 <= cutoff && dist3 <= cutoff && dist4 <= cutoff {
draw = false
break
}
}
}
if draw {
for j := i; j < i+4; j++ {
gl.Normal3f(self.vertices[j].n[0], self.vertices[j].n[1], self.vertices[j].n[2])
gl.TexCoord2f(self.vertices[j].t[0], self.vertices[j].t[1])
gl.Color4f(self.vertices[j].c[0], self.vertices[j].c[1], self.vertices[j].c[2], self.vertices[j].c[3])
gl.Materialfv(gl.FRONT, gl.EMISSION, []float32{self.vertices[j].e[0], self.vertices[j].e[1], self.vertices[j].e[2], self.vertices[j].e[3]})
gl.Vertex3f(self.vertices[j].p[0], self.vertices[j].p[1], self.vertices[j].p[2])
}
console.vertices += 4
} else {
console.culledVertices += 4
}
}
gl.End()
} else {
gl.Begin(gl.QUADS)
for i := 0; i < self.vertexCount; i++ {
gl.Normal3f(self.vertices[i].n[0], self.vertices[i].n[1], self.vertices[i].n[2])
gl.TexCoord2f(self.vertices[i].t[0], self.vertices[i].t[1])
gl.Color4f(self.vertices[i].c[0], self.vertices[i].c[1], self.vertices[i].c[2], self.vertices[i].c[3])
gl.Materialfv(gl.FRONT, gl.EMISSION, []float32{self.vertices[i].e[0], self.vertices[i].e[1], self.vertices[i].e[2], self.vertices[i].e[3]})
gl.Vertex3f(self.vertices[i].p[0], self.vertices[i].p[1], self.vertices[i].p[2])
}
gl.End()
}
self.texture.Unbind(gl.TEXTURE_2D)
}
func LoadPlayerTextures() {
var file, err = os.Open("res/player.png")
var img image.Image
if err != nil {
panic(err)
}
defer file.Close()
if img, _, err = image.Decode(file); err != nil {
panic(err)
}
unit := 12
hatFront := image.NewRGBA(image.Rect(0, 0, unit, unit))
for x := 0; x < unit; x++ {
for y := 0; y < unit; y++ {
hatFront.Set(x, y, img.At(x, y))
}
}
textures[TEXTURE_HAT_FRONT] = imageSectionToTexture(img, image.Rect(0, 0, unit, unit))
textures[TEXTURE_HAT_LEFT] = imageSectionToTexture(img, image.Rect(unit+1, 0, 2*unit, unit))
textures[TEXTURE_HAT_BACK] = imageSectionToTexture(img, image.Rect(2*unit+1, 0, 3*unit, unit))
textures[TEXTURE_HAT_RIGHT] = imageSectionToTexture(img, image.Rect(3*unit+1, 0, 4*unit, unit))
textures[TEXTURE_HAT_TOP] = imageSectionToTexture(img, image.Rect(4*unit+1, 0, 5*unit, unit))
textures[TEXTURE_HEAD_FRONT] = imageSectionToTexture(img, image.Rect(0, unit+1, unit, 2*unit))
textures[TEXTURE_HEAD_LEFT] = imageSectionToTexture(img, image.Rect(unit+1, unit+1, 2*unit, 2*unit))
textures[TEXTURE_HEAD_BACK] = imageSectionToTexture(img, image.Rect(2*unit+1, unit+1, 3*unit, 2*unit))
textures[TEXTURE_HEAD_RIGHT] = imageSectionToTexture(img, image.Rect(3*unit+1, unit+1, 4*unit, 2*unit))
textures[TEXTURE_HEAD_BOTTOM] = imageSectionToTexture(img, image.Rect(4*unit+1, unit+1, 5*unit, 2*unit))
textures[TEXTURE_TORSO_FRONT] = imageSectionToTexture(img, image.Rect(0, 2*unit+1, 2*unit, 5*unit+unit/4))
textures[TEXTURE_TORSO_LEFT] = imageSectionToTexture(img, image.Rect(2*unit+1, 2*unit+1, 3*unit, 5*unit+unit/4))
textures[TEXTURE_TORSO_BACK] = imageSectionToTexture(img, image.Rect(3*unit+1, 2*unit+1, 5*unit, 5*unit+unit/4))
textures[TEXTURE_TORSO_RIGHT] = imageSectionToTexture(img, image.Rect(5*unit+1, 2*unit+1, 6*unit, 5*unit+unit/4))
textures[TEXTURE_TORSO_TOP] = imageSectionToTexture(img, image.Rect(32, 64, 55, 75))
textures[TEXTURE_LEG] = imageSectionToTexture(img, image.Rect(0, 64, 11, 105))
textures[TEXTURE_LEG_SIDE] = imageSectionToTexture(img, image.Rect(12, 64, 22, 105))
textures[TEXTURE_ARM] = imageSectionToTexture(img, image.Rect(23, 57, 31, 96))
textures[TEXTURE_ARM_TOP] = imageSectionToTexture(img, image.Rect(56, 64, 64, 72))
textures[TEXTURE_BRIM] = imageSectionToTexture(img, image.Rect(31, 76, 49, 78))
textures[TEXTURE_HAND] = imageSectionToTexture(img, image.Rect(23, 97, 31, 105))
}
func LoadWolfTextures() {
var file, err = os.Open("res/wolf.png")
var img image.Image
if err != nil {
panic(err)
}
defer file.Close()
if img, _, err = image.Decode(file); err != nil {
panic(err)
}
unit := 12
hatFront := image.NewRGBA(image.Rect(0, 0, unit, unit))
for x := 0; x < unit; x++ {
for y := 0; y < unit; y++ {
hatFront.Set(x, y, img.At(x, y))
}
}
textures[TEXTURE_WOLF_HEAD_BACK] = imageSectionToTexture(img, image.Rect(0, 0, 11, 11))
textures[TEXTURE_WOLF_HEAD_FRONT] = imageSectionToTexture(img, image.Rect(0, 12, 12, 23))
textures[TEXTURE_WOLF_HEAD_TOP] = imageSectionToTexture(img, image.Rect(unit+1, 0, 3*unit, unit))
textures[TEXTURE_WOLF_HEAD_SIDE] = imageSectionToTexture(img, image.Rect(unit+1, unit+1, 3*unit, 2*unit))
textures[TEXTURE_WOLF_HEAD_BOTTOM] = imageSectionToTexture(img, image.Rect(unit+1, 2*unit+1, 3*unit, 3*unit))
textures[TEXTURE_WOLF_TORSO_BACK] = imageSectionToTexture(img, image.Rect(0, 3*unit+1, 1*unit+unit/2, 4*unit+unit/2))
textures[TEXTURE_WOLF_TORSO_FRONT] = imageSectionToTexture(img, image.Rect(0, 4*unit+unit/2+1, 1*unit+unit/2, 6*unit))
textures[TEXTURE_WOLF_TORSO_TOP] = imageSectionToTexture(img, image.Rect(1*unit+unit/2+1, 3*unit+1, 6*unit+unit/2, 4*unit+unit/2))
textures[TEXTURE_WOLF_TORSO_SIDE] = imageSectionToTexture(img, image.Rect(1*unit+unit/2+1, 4*unit+unit/2+1, 6*unit+unit/2, 6*unit))
textures[TEXTURE_WOLF_TORSO_BOTTOM] = imageSectionToTexture(img, image.Rect(1*unit+unit/2+1, 6*unit+1, 6*unit+unit/2, 7*unit+unit/2))
textures[TEXTURE_WOLF_LEG] = imageSectionToTexture(img, image.Rect(6*unit+unit/2+1, 0, 6*unit+unit/2+8, 39))
}
func imageSectionToTexture(img image.Image, r image.Rectangle) *gl.Texture {
rgba := image.NewRGBA(image.Rect(0, 0, r.Max.X-r.Min.X, r.Max.Y-r.Min.Y))
for x := r.Min.X; x < r.Max.X+1; x++ {
for y := r.Min.Y; y < r.Max.Y+1; y++ {
rgba.Set(x-r.Min.X, y-r.Min.Y, img.At(x, y))
}
}
return imageToTexture(rgba)
}
func imageToTexture(rgba *image.RGBA) *gl.Texture {
rect := rgba.Bounds()
texture := gl.GenTexture()
texture.Bind(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, rect.Max.X, rect.Max.Y, 0, gl.RGBA, gl.UNSIGNED_BYTE, &rgba.Pix[0])
texture.Unbind(gl.TEXTURE_2D)
return &texture
}
func loadTexture(filename string) *gl.Texture {
var img image.Image
var file, err = os.Open(filename)
if err != nil {
panic(err)
}
defer file.Close()
if img, _, err = image.Decode(file); err != nil {
panic(err)
}
rect := img.Bounds()
rgba := image.NewRGBA(rect)
for x := 0; x < rect.Max.X; x++ {
for y := 0; y < rect.Max.Y; y++ {
rgba.Set(x, y, img.At(x, y))
}
}
texture := gl.GenTexture()
texture.Bind(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, rect.Max.X, rect.Max.Y, 0, gl.RGBA, gl.UNSIGNED_BYTE, &rgba.Pix[0])
texture.Unbind(gl.TEXTURE_2D)
return &texture
}
func TerrainCube(vertexBuffer *VertexBuffer, pos Vectori, neighbours [18]BlockId, block Block, selectedFace uint8) {
x := float32(pos[XAXIS])
y := float32(pos[YAXIS])
z := float32(pos[ZAXIS])
blocktype := items[ItemId(block.id)]
var visible [6]bool
var shadeLevels [6]int
for i := 0; i < 6; i++ {
if items[ItemId(neighbours[i])].transparent {
visible[i] = true
}
}
// Shading disabled for moment for performance reasons
if items[ItemId(neighbours[EAST_FACE])].transparent {
visible[EAST_FACE] = true
if !items[ItemId(neighbours[DIR_NE])].transparent {
shadeLevels[EAST_FACE]++
}
if !items[ItemId(neighbours[DIR_SE])].transparent {
shadeLevels[EAST_FACE]++
}
if !items[ItemId(neighbours[DIR_UE])].transparent {
shadeLevels[EAST_FACE]++
}
if !items[ItemId(neighbours[DIR_DE])].transparent {
shadeLevels[EAST_FACE]++
}
}
if items[ItemId(neighbours[WEST_FACE])].transparent {
visible[WEST_FACE] = true
if !items[ItemId(neighbours[DIR_NW])].transparent {
shadeLevels[WEST_FACE]++
}
if !items[ItemId(neighbours[DIR_SW])].transparent {
shadeLevels[WEST_FACE]++
}
if !items[ItemId(neighbours[DIR_UW])].transparent {
shadeLevels[WEST_FACE]++
}
if !items[ItemId(neighbours[DIR_DW])].transparent {
shadeLevels[WEST_FACE]++
}
}
if items[ItemId(neighbours[NORTH_FACE])].transparent {
visible[NORTH_FACE] = true
if !items[ItemId(neighbours[DIR_NW])].transparent {
shadeLevels[NORTH_FACE]++
}
if !items[ItemId(neighbours[DIR_NE])].transparent {
shadeLevels[NORTH_FACE]++
}
if !items[ItemId(neighbours[DIR_UN])].transparent {
shadeLevels[NORTH_FACE]++
}
if !items[ItemId(neighbours[DIR_DN])].transparent {
shadeLevels[NORTH_FACE]++
}
}
if items[ItemId(neighbours[SOUTH_FACE])].transparent {
visible[SOUTH_FACE] = true
if !items[ItemId(neighbours[DIR_SW])].transparent {
shadeLevels[SOUTH_FACE]++
}
if !items[ItemId(neighbours[DIR_SE])].transparent {
shadeLevels[SOUTH_FACE]++
}
if !items[ItemId(neighbours[DIR_US])].transparent {
shadeLevels[SOUTH_FACE]++
}
if !items[ItemId(neighbours[DIR_DS])].transparent {
shadeLevels[SOUTH_FACE]++
}
}
if items[ItemId(neighbours[UP_FACE])].transparent {
visible[UP_FACE] = true
if !items[ItemId(neighbours[DIR_UN])].transparent {
shadeLevels[UP_FACE]++
}
if !items[ItemId(neighbours[DIR_UE])].transparent {
shadeLevels[UP_FACE]++
}
if !items[ItemId(neighbours[DIR_US])].transparent {
shadeLevels[UP_FACE]++
}
if !items[ItemId(neighbours[DIR_UW])].transparent {
shadeLevels[UP_FACE]++
}
}
if items[ItemId(neighbours[DOWN_FACE])].transparent {
visible[DOWN_FACE] = true
if !items[ItemId(neighbours[DIR_UN])].transparent {
shadeLevels[DOWN_FACE]++
}
if !items[ItemId(neighbours[DIR_UE])].transparent {
shadeLevels[DOWN_FACE]++
}
if !items[ItemId(neighbours[DIR_US])].transparent {
shadeLevels[DOWN_FACE]++
}
if !items[ItemId(neighbours[DIR_UW])].transparent {
shadeLevels[DOWN_FACE]++
}
}
switch blocktype.shape {
case SHAPE_PILE:
Pile(vertexBuffer, x, y, z, ORIENT_EAST, block, blocktype, visible, shadeLevels, selectedFace)
case SHAPE_SLAB:
if neighbours[NORTH_FACE] != BLOCK_AIR {
if neighbours[EAST_FACE] != BLOCK_AIR {
if neighbours[SOUTH_FACE] != BLOCK_AIR {
if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to all four sides
SlabCross(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Blocks to north, east, south
SlabTee(vertexBuffer, x, y, z, ORIENT_EAST, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to north, east, west
SlabTee(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Blocks to north, east
SlabCorner(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[SOUTH_FACE] != BLOCK_AIR {
if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to north, south, west
SlabTee(vertexBuffer, x, y, z, ORIENT_WEST, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Blocks to north, south
SlabLine(vertexBuffer, x, y, z, ORIENT_WEST, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to the north and west
SlabCorner(vertexBuffer, x, y, z, ORIENT_WEST, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Just a block to the north
SlabLine(vertexBuffer, x, y, z, ORIENT_WEST, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[EAST_FACE] != BLOCK_AIR {
if neighbours[SOUTH_FACE] != BLOCK_AIR {
if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to east, south, west
SlabTee(vertexBuffer, x, y, z, ORIENT_SOUTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Blocks to east, south
SlabCorner(vertexBuffer, x, y, z, ORIENT_EAST, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to east, west
SlabLine(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Just a block to the east
SlabLine(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[SOUTH_FACE] != BLOCK_AIR {
if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to south, west
SlabCorner(vertexBuffer, x, y, z, ORIENT_SOUTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Just a block to the south
SlabLine(vertexBuffer, x, y, z, ORIENT_WEST, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[WEST_FACE] != BLOCK_AIR {
// Just a block to the west
SlabLine(vertexBuffer, x, y, z, ORIENT_SOUTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Lone block
SlabSingle(vertexBuffer, x, y, z, block.Orientation(), block, blocktype, visible, shadeLevels, selectedFace)
}
case SHAPE_WALL:
if neighbours[NORTH_FACE] != BLOCK_AIR {
if neighbours[EAST_FACE] != BLOCK_AIR {
if neighbours[SOUTH_FACE] != BLOCK_AIR {
if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to all four sides
WallCross(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Blocks to north, east, south
WallTee(vertexBuffer, x, y, z, ORIENT_EAST, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to north, east, west
WallTee(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Blocks to north, east
WallCorner(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[SOUTH_FACE] != BLOCK_AIR {
if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to north, south, west
WallTee(vertexBuffer, x, y, z, ORIENT_WEST, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Blocks to north, south
WallSingle(vertexBuffer, x, y, z, ORIENT_WEST, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to the north and west
WallCorner(vertexBuffer, x, y, z, ORIENT_WEST, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Just a block to the north
WallSingle(vertexBuffer, x, y, z, ORIENT_WEST, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[EAST_FACE] != BLOCK_AIR {
if neighbours[SOUTH_FACE] != BLOCK_AIR {
if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to east, south, west
WallTee(vertexBuffer, x, y, z, ORIENT_SOUTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Blocks to east, south
WallCorner(vertexBuffer, x, y, z, ORIENT_EAST, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to east, west
WallSingle(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Just a block to the east
WallSingle(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[SOUTH_FACE] != BLOCK_AIR {
if neighbours[WEST_FACE] != BLOCK_AIR {
// Blocks to south, west
WallCorner(vertexBuffer, x, y, z, ORIENT_SOUTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Just a block to the south
WallSingle(vertexBuffer, x, y, z, ORIENT_WEST, block, blocktype, visible, shadeLevels, selectedFace)
}
} else if neighbours[WEST_FACE] != BLOCK_AIR {
// Just a block to the west
WallSingle(vertexBuffer, x, y, z, ORIENT_NORTH, block, blocktype, visible, shadeLevels, selectedFace)
} else {
// Lone block
WallSingle(vertexBuffer, x, y, z, block.Orientation(), block, blocktype, visible, shadeLevels, selectedFace)
}
default:
Cuboid2(vertexBuffer, x, y, z, 1, 1, 1, blocktype, visible, shadeLevels, selectedFace, block)
}
}
func RenderItemFlat(vertexBuffer *VertexBuffer, pos Vectori, blockid BlockId) {
x := float32(pos[XAXIS])
y := float32(pos[YAXIS])
z := float32(pos[ZAXIS])
blocktype := items[ItemId(blockid)]
vertexBuffer.AddFace(UP_FACE, blocktype.texture1, false, 0,
false,
x+0.5, y+0.5, z+0.5, 1.0, 1.0,
x-0.5, y+0.5, z-0.5, 0.0, 0.0)
}
func RenderQuads(v []Vertex) {
gl.Begin(gl.QUADS)
for i := 0; i < len(v); i++ {
gl.Normal3f(v[i].n[0], v[i].n[1], v[i].n[2])
gl.TexCoord2f(v[i].t[0], v[i].t[1])
gl.Color4f(v[i].c[0], v[i].c[1], v[i].c[2], v[i].c[3])
gl.Materialfv(gl.FRONT, gl.EMISSION, []float32{v[i].e[0], v[i].e[1], v[i].e[2], v[i].e[3]})
gl.Vertex3f(v[i].p[0], v[i].p[1], v[i].p[2])
}
gl.End()
}
func Cuboid2(vertexBuffer *VertexBuffer, x float32, y float32, z float32, bw float64, bh float64, bd float64, blocktype Item, visible [6]bool, shadeLevels [6]int, selectedFace uint8, block Block) {
w, h, d := float32(bw)/2, float32(bh)/2, float32(bd)/2
// East face
if visible[EAST_FACE] {
texture := blocktype.texture1
if blocktype.shape == SHAPE_ORIENTED_CUBE && block.Orientation() == ORIENT_EAST {
texture = blocktype.texture2
}
vertexBuffer.AddFace(EAST_FACE, texture, selectedFace == EAST_FACE, shadeLevels[EAST_FACE],
block.Damaged(),
x+d, y+h, z-w, 0.0, 0.0,
x+d, y-h, z+w, 1.0, 1.0)
}
// West Face
if visible[WEST_FACE] {
texture := blocktype.texture1
if blocktype.shape == SHAPE_ORIENTED_CUBE && block.Orientation() == ORIENT_WEST {
texture = blocktype.texture2
}
vertexBuffer.AddFace(WEST_FACE, texture, selectedFace == WEST_FACE, shadeLevels[WEST_FACE],
block.Damaged(),
x-d, y+h, z-w, 0.0, 0.0,
x-d, y-h, z+w, 1.0, 1.0)
}
// North Face
if visible[NORTH_FACE] {
texture := blocktype.texture1
if blocktype.shape == SHAPE_ORIENTED_CUBE && block.Orientation() == ORIENT_NORTH {
texture = blocktype.texture2
}
vertexBuffer.AddFace(NORTH_FACE, texture, selectedFace == NORTH_FACE, shadeLevels[NORTH_FACE],
block.Damaged(),
x+d, y+h, z-w, 0.0, 0.0,
x-d, y-h, z-w, 1.0, 1.0)
}
// South Face
if visible[SOUTH_FACE] {
texture := blocktype.texture1
if blocktype.shape == SHAPE_ORIENTED_CUBE && block.Orientation() == ORIENT_SOUTH {
texture = blocktype.texture2
}
vertexBuffer.AddFace(SOUTH_FACE, texture, selectedFace == SOUTH_FACE, shadeLevels[SOUTH_FACE],
block.Damaged(),
x+d, y+h, z+w, 0.0, 0.0,
x-d, y-h, z+w, 1.0, 1.0)
}
// Up Face
if visible[UP_FACE] {
texture := blocktype.texture2
if blocktype.shape == SHAPE_ORIENTED_CUBE {
texture = blocktype.texture1
}
vertexBuffer.AddFace(UP_FACE, texture, selectedFace == UP_FACE, shadeLevels[UP_FACE],
block.Damaged(),
x+d, y+h, z-w, 1.0, 1.0,
x-d, y+h, z+w, 0.0, 0.0)
}
// Down Face
if visible[DOWN_FACE] {
texture := blocktype.texture2
if blocktype.shape == SHAPE_ORIENTED_CUBE {
texture = blocktype.texture1
}
vertexBuffer.AddFace(DOWN_FACE, texture, selectedFace == DOWN_FACE, shadeLevels[DOWN_FACE],
block.Damaged(),
x+d, y-h, z-w, 1.0, 1.0,
x-d, y-h, z+w, 0.0, 0.0)
}
}
func Cuboid(pos Vectorf, bw float64, bh float64, bd float64, etexture *gl.Texture, wtexture *gl.Texture, ntexture *gl.Texture, stexture *gl.Texture, utexture *gl.Texture, dtexture *gl.Texture, selectedFace uint8) {
w, h, d := float32(bw)/2, float32(bh)/2, float32(bd)/2
// East face
if etexture != nil {
c := COLOUR_WHITE
if selectedFace == EAST_FACE {
c = COLOUR_HIGH
}
e := LightLevel(pos, NORMALS[EAST_FACE])
v := []Vertex{
{p: [3]float32{d, -h, -w}, t: [2]float32{1.0, 1.0}, n: NORMALS[EAST_FACE], c: c, e: e},
{p: [3]float32{d, h, -w}, t: [2]float32{1.0, 0.0}, n: NORMALS[EAST_FACE], c: c, e: e},
{p: [3]float32{d, h, w}, t: [2]float32{0.0, 0.0}, n: NORMALS[EAST_FACE], c: c, e: e},
{p: [3]float32{d, -h, w}, t: [2]float32{0.0, 1.0}, n: NORMALS[EAST_FACE], c: c, e: e},
}
etexture.Bind(gl.TEXTURE_2D)
RenderQuads(v)
etexture.Unbind(gl.TEXTURE_2D)
}
// West Face
if wtexture != nil {
c := COLOUR_WHITE
if selectedFace == WEST_FACE {
c = COLOUR_HIGH
}
e := LightLevel(pos, NORMALS[WEST_FACE])
v := []Vertex{
{p: [3]float32{-d, -h, -w}, t: [2]float32{0.0, 1.0}, n: NORMALS[WEST_FACE], c: c, e: e},
{p: [3]float32{-d, -h, w}, t: [2]float32{1.0, 1.0}, n: NORMALS[WEST_FACE], c: c, e: e},
{p: [3]float32{-d, h, w}, t: [2]float32{1.0, 0.0}, n: NORMALS[WEST_FACE], c: c, e: e},
{p: [3]float32{-d, h, -w}, t: [2]float32{0.0, 0.0}, n: NORMALS[WEST_FACE], c: c, e: e},
}
wtexture.Bind(gl.TEXTURE_2D)
RenderQuads(v)
wtexture.Unbind(gl.TEXTURE_2D)
}
// North Face
if ntexture != nil {
c := COLOUR_WHITE
if selectedFace == NORTH_FACE {
c = COLOUR_HIGH
}
e := LightLevel(pos, NORMALS[NORTH_FACE])
v := []Vertex{
{p: [3]float32{-d, -h, -w}, t: [2]float32{1.0, 1.0}, n: NORMALS[NORTH_FACE], c: c, e: e},
{p: [3]float32{-d, h, -w}, t: [2]float32{1.0, 0.0}, n: NORMALS[NORTH_FACE], c: c, e: e},
{p: [3]float32{d, h, -w}, t: [2]float32{0.0, 0.0}, n: NORMALS[NORTH_FACE], c: c, e: e},
{p: [3]float32{d, -h, -w}, t: [2]float32{0.0, 1.0}, n: NORMALS[NORTH_FACE], c: c, e: e},
}
ntexture.Bind(gl.TEXTURE_2D)
RenderQuads(v)
ntexture.Unbind(gl.TEXTURE_2D)
}
// South Face
if stexture != nil {
c := COLOUR_WHITE
if selectedFace == SOUTH_FACE {
c = COLOUR_HIGH
}
e := LightLevel(pos, NORMALS[SOUTH_FACE])
v := []Vertex{
{p: [3]float32{-d, -h, w}, t: [2]float32{1.0, 1.0}, n: NORMALS[SOUTH_FACE], c: c, e: e},
{p: [3]float32{d, -h, w}, t: [2]float32{0.0, 1.0}, n: NORMALS[SOUTH_FACE], c: c, e: e},
{p: [3]float32{d, h, w}, t: [2]float32{0.0, 0.0}, n: NORMALS[SOUTH_FACE], c: c, e: e},
{p: [3]float32{-d, h, w}, t: [2]float32{1.0, 0.0}, n: NORMALS[SOUTH_FACE], c: c, e: e},
}
stexture.Bind(gl.TEXTURE_2D)
RenderQuads(v)
stexture.Unbind(gl.TEXTURE_2D)
}
// Up Face
if utexture != nil {
c := COLOUR_WHITE
if selectedFace == UP_FACE {
c = COLOUR_HIGH
}
e := LightLevel(pos, NORMALS[UP_FACE])
v := []Vertex{
{p: [3]float32{-d, h, -w}, t: [2]float32{1.0, 1.0}, n: NORMALS[UP_FACE], c: c, e: e},
{p: [3]float32{d, h, -w}, t: [2]float32{1.0, 0.0}, n: NORMALS[UP_FACE], c: c, e: e},
{p: [3]float32{d, h, w}, t: [2]float32{0.0, 0.0}, n: NORMALS[UP_FACE], c: c, e: e},
{p: [3]float32{-d, h, w}, t: [2]float32{0.0, 1.0}, n: NORMALS[UP_FACE], c: c, e: e},
}
utexture.Bind(gl.TEXTURE_2D)
RenderQuads(v)
utexture.Unbind(gl.TEXTURE_2D)
}
// Down Face
if dtexture != nil {
c := COLOUR_WHITE
if selectedFace == DOWN_FACE {
c = COLOUR_HIGH
}
e := LightLevel(pos, NORMALS[DOWN_FACE])
v := []Vertex{
{p: [3]float32{-d, -h, -w}, t: [2]float32{1.0, 1.0}, n: NORMALS[DOWN_FACE], c: c, e: e},
{p: [3]float32{d, -h, -w}, t: [2]float32{0.0, 1.0}, n: NORMALS[DOWN_FACE], c: c, e: e},
{p: [3]float32{d, -h, w}, t: [2]float32{0.0, 0.0}, n: NORMALS[DOWN_FACE], c: c, e: e},
{p: [3]float32{-d, -h, w}, t: [2]float32{1.0, 0.0}, n: NORMALS[DOWN_FACE], c: c, e: e},
}
dtexture.Bind(gl.TEXTURE_2D)
RenderQuads(v)
dtexture.Unbind(gl.TEXTURE_2D)
}
}
func CheckGLError() {
glerr := gl.GetError()
if glerr&gl.INVALID_ENUM == gl.INVALID_ENUM {
println("gl error: INVALID_ENUM")
}
if glerr&gl.INVALID_VALUE != 0 {
println("gl error: INVALID_VALUE")
}
if glerr&gl.INVALID_OPERATION != 0 {
println("gl error: INVALID_OPERATION")
}
if glerr&gl.STACK_OVERFLOW != 0 {
println("gl error: STACK_OVERFLOW")
}
if glerr&gl.STACK_UNDERFLOW != 0 {
println("gl error: STACK_UNDERFLOW")
}
if glerr&gl.OUT_OF_MEMORY != 0 {
println("gl error: OUT_OF_MEMORY")
}
if glerr&gl.TABLE_TOO_LARGE != 0 {
println("gl error: TABLE_TOO_LARGE ")
}
if glerr != gl.NO_ERROR {
panic("Got an OpenGL Error")
}
}
func Line(v Vectorf) {
gl.Begin(gl.LINE)
gl.Vertex3f(0, 0, 0)
gl.Vertex3f(float32(v[XAXIS]), float32(v[YAXIS]), float32(v[ZAXIS]))
gl.End()
}
func WallSingle(vertexBuffer *VertexBuffer, x float32, y float32, z float32, orient byte, block Block, blocktype Item, visible [6]bool, shadeLevels [6]int, selectedFace uint8) {
var p1, p2, p3, p4 float32 = -1.0 / 2, -1.0 / 6, 1.0 / 6, 1.0 / 2
if visible[EAST_FACE] && (orient == ORIENT_NORTH || orient == ORIENT_SOUTH) {
vertexBuffer.AddFace(EAST_FACE, blocktype.texture1, selectedFace == EAST_FACE, shadeLevels[EAST_FACE],
block.Damaged(),
x+p4, y+p1, z+p2, 2.0/3, 1.0,
x+p4, y+p4, z+p3, 1.0/3, 0.0)
} else if orient == ORIENT_EAST || orient == ORIENT_WEST {
vertexBuffer.AddFace(EAST_FACE, blocktype.texture1, selectedFace == EAST_FACE, shadeLevels[EAST_FACE],
block.Damaged(),
x+p3, y+p1, z+p1, 1.0, 1.0,
x+p3, y+p4, z+p4, 0.0, 0.0)
}
if visible[WEST_FACE] && (orient == ORIENT_NORTH || orient == ORIENT_SOUTH) {
vertexBuffer.AddFace(WEST_FACE, blocktype.texture1, selectedFace == WEST_FACE, shadeLevels[WEST_FACE],
block.Damaged(),
x+p1, y+p1, z+p2, 2.0/3, 1.0,
x+p1, y+p4, z+p3, 1.0/3, 0.0)
} else if orient == ORIENT_EAST || orient == ORIENT_WEST {
vertexBuffer.AddFace(WEST_FACE, blocktype.texture1, selectedFace == WEST_FACE, shadeLevels[WEST_FACE],
block.Damaged(),
x+p2, y+p1, z+p1, 1.0, 1.0,
x+p2, y+p4, z+p4, 0.0, 0.0)
}
if visible[NORTH_FACE] && (orient == ORIENT_NORTH || orient == ORIENT_SOUTH) {
vertexBuffer.AddFace(NORTH_FACE, blocktype.texture1, selectedFace == NORTH_FACE, shadeLevels[NORTH_FACE],
block.Damaged(),
x+p1, y+p1, z+p2, 1.0, 1.0,
x+p4, y+p4, z+p2, 0.0, 0.0)
} else if orient == ORIENT_EAST || orient == ORIENT_WEST {
vertexBuffer.AddFace(NORTH_FACE, blocktype.texture1, selectedFace == NORTH_FACE, shadeLevels[NORTH_FACE],
block.Damaged(),
x+p2, y+p1, z+p1, 2.0/3, 1.0,
x+p3, y+p4, z+p1, 1.0/3, 0.0)
}
if visible[SOUTH_FACE] && (orient == ORIENT_NORTH || orient == ORIENT_SOUTH) {
vertexBuffer.AddFace(SOUTH_FACE, blocktype.texture1, selectedFace == SOUTH_FACE, shadeLevels[SOUTH_FACE],
block.Damaged(),
x+p1, y+p1, z+p3, 1.0, 1.0,
x+p4, y+p4, z+p3, 0.0, 0.0)
} else if orient == ORIENT_EAST || orient == ORIENT_WEST {
vertexBuffer.AddFace(SOUTH_FACE, blocktype.texture1, selectedFace == SOUTH_FACE, shadeLevels[SOUTH_FACE],
block.Damaged(),
x+p2, y+p1, z+p4, 2.0/3, 1.0,
x+p3, y+p4, z+p4, 1.0/3, 0.0)
}
if visible[UP_FACE] && (orient == ORIENT_NORTH || orient == ORIENT_SOUTH) {
vertexBuffer.AddFace(UP_FACE, blocktype.texture2, selectedFace == UP_FACE, shadeLevels[UP_FACE],
block.Damaged(),
x+p1, y+p4, z+p2, 1.0, 2.0/3,
x+p4, y+p4, z+p3, 0.0, 1.0/3)
} else if orient == ORIENT_EAST || orient == ORIENT_WEST {
vertexBuffer.AddFace(UP_FACE, blocktype.texture2, selectedFace == UP_FACE, shadeLevels[UP_FACE],
block.Damaged(),
x+p2, y+p4, z+p1, 2.0/3, 1.0,
x+p3, y+p4, z+p4, 1.0/3, 0.0)
}
if visible[DOWN_FACE] && (orient == ORIENT_NORTH || orient == ORIENT_SOUTH) {
vertexBuffer.AddFace(DOWN_FACE, blocktype.texture1, selectedFace == DOWN_FACE, shadeLevels[DOWN_FACE],
block.Damaged(),
x+p1, y+p1, z+p2, 1.0, 2.0/3,
x+p4, y+p1, z+p3, 0.0, 1.0/3)
} else if orient == ORIENT_EAST || orient == ORIENT_WEST {
vertexBuffer.AddFace(DOWN_FACE, blocktype.texture1, selectedFace == DOWN_FACE, shadeLevels[DOWN_FACE],
block.Damaged(),
x+p2, y+p1, z+p1, 2.0/3, 1.0,
x+p3, y+p1, z+p4, 1.0/3, 0.0)
}
}
func WallTee(vertexBuffer *VertexBuffer, x float32, y float32, z float32, orient byte, block Block, blocktype Item, visible [6]bool, shadeLevels [6]int, selectedFace uint8) {
var p1, p2, p3, p4 float32 = -1.0 / 2, -1.0 / 6, 1.0 / 6, 1.0 / 2
WallSingle(vertexBuffer, x, y, z, orient, block, blocktype, visible, shadeLevels, selectedFace)
if orient == ORIENT_NORTH {
// X
// XXX
//
vertexBuffer.AddFace(EAST_FACE, blocktype.texture1, selectedFace == EAST_FACE, shadeLevels[EAST_FACE],
block.Damaged(),
x+p3, y+p1, z+p1, 2.0/3, 1.0,
x+p3, y+p4, z+p2, 1.0/3, 0.0)
vertexBuffer.AddFace(WEST_FACE, blocktype.texture1, selectedFace == WEST_FACE, shadeLevels[WEST_FACE],
block.Damaged(),
x+p2, y+p1, z+p1, 2.0/3, 1.0,
x+p2, y+p4, z+p2, 1.0/3, 0.0)
if visible[UP_FACE] {
vertexBuffer.AddFace(UP_FACE, blocktype.texture2, selectedFace == UP_FACE, shadeLevels[UP_FACE],
block.Damaged(),
x+p2, y+p4, z+p1, 2.0/3, 2.0/3,
x+p3, y+p4, z+p2, 1.0/3, 1.0/3)
}
if visible[DOWN_FACE] {
vertexBuffer.AddFace(DOWN_FACE, blocktype.texture1, selectedFace == DOWN_FACE, shadeLevels[DOWN_FACE],
block.Damaged(),
x+p2, y+p1, z+p1, 2.0/3, 2.0/3,
x+p3, y+p1, z+p2, 1.0/3, 1.0/3)
}
} else if orient == ORIENT_WEST {
// X
// XX
// X
vertexBuffer.AddFace(NORTH_FACE, blocktype.texture1, selectedFace == NORTH_FACE, shadeLevels[NORTH_FACE],
block.Damaged(),
x+p1, y+p1, z+p2, 2.0/3, 1.0,
x+p2, y+p4, z+p2, 1.0/3, 0.0)
vertexBuffer.AddFace(SOUTH_FACE, blocktype.texture1, selectedFace == SOUTH_FACE, shadeLevels[SOUTH_FACE],
block.Damaged(),
x+p1, y+p1, z+p3, 2.0/3, 1.0,
x+p2, y+p4, z+p3, 1.0/3, 0.0)
if visible[UP_FACE] {
vertexBuffer.AddFace(UP_FACE, blocktype.texture2, selectedFace == UP_FACE, shadeLevels[UP_FACE],
block.Damaged(),
x+p1, y+p4, z+p2, 2.0/3, 2.0/3,
x+p2, y+p4, z+p3, 1.0/3, 1.0/3)
}
if visible[DOWN_FACE] {
vertexBuffer.AddFace(DOWN_FACE, blocktype.texture1, selectedFace == DOWN_FACE, shadeLevels[DOWN_FACE],
block.Damaged(),
x+p1, y+p1, z+p3, 2.0/3, 2.0/3,