func (d *Dictionary) RenderString(s string, x, y, z, height float64, just Justification) {
if len(s) == 0 {
return
}
strbuf, ok := d.strs[s]
if !ok {
defer d.RenderString(s, x, y, z, height, just)
}
size := unsafe.Sizeof(dictVert{})
scale := height / float64(d.data.Maxy-d.data.Miny)
width := float32(d.figureWidth(s) * scale)
x_pos := float32(x)
switch just {
case Center:
x_pos -= width / 2
case Right:
x_pos -= width
}
if ok {
gl.PushMatrix()
defer gl.PopMatrix()
gl.Translated(gl.Double(x_pos), gl.Double(y), gl.Double(z))
gl.Scaled(gl.Double(scale), gl.Double(scale), 1)
gl.PushAttrib(gl.COLOR_BUFFER_BIT)
defer gl.PopAttrib()
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.TEXTURE_2D)
gl.BindTexture(gl.TEXTURE_2D, gl.Uint(d.texture))
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(strbuf.vbuffer))
gl.EnableClientState(gl.VERTEX_ARRAY)
gl.VertexPointer(2, gl.FLOAT, gl.Sizei(size), nil)
gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(size), gl.Pointer(unsafe.Offsetof(strbuf.vs[0].u)))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(strbuf.ibuffer))
gl.DrawElements(gl.TRIANGLES, gl.Sizei(len(strbuf.is)), gl.UNSIGNED_SHORT, nil)
gl.DisableClientState(gl.VERTEX_ARRAY)
gl.DisableClientState(gl.TEXTURE_COORD_ARRAY)
return
}
x_pos = 0
for _, r := range s {
info := d.getInfo(r)
xleft := x_pos + float32(info.Bounds.Min.X)
xright := x_pos + float32(info.Bounds.Max.X)
ytop := float32(d.data.Maxy - info.Bounds.Min.Y)
ybot := float32(height) + float32(d.data.Miny-info.Bounds.Max.Y)
start := uint16(len(strbuf.vs))
strbuf.is = append(strbuf.is, start+0)
strbuf.is = append(strbuf.is, start+1)
strbuf.is = append(strbuf.is, start+2)
strbuf.is = append(strbuf.is, start+0)
strbuf.is = append(strbuf.is, start+2)
strbuf.is = append(strbuf.is, start+3)
strbuf.vs = append(strbuf.vs, dictVert{
x: xleft,
y: ybot,
u: float32(info.Pos.Min.X) / float32(d.data.Dx),
v: float32(info.Pos.Max.Y) / float32(d.data.Dy),
})
strbuf.vs = append(strbuf.vs, dictVert{
x: xleft,
y: ytop,
u: float32(info.Pos.Min.X) / float32(d.data.Dx),
v: float32(info.Pos.Min.Y) / float32(d.data.Dy),
})
strbuf.vs = append(strbuf.vs, dictVert{
x: xright,
y: ytop,
u: float32(info.Pos.Max.X) / float32(d.data.Dx),
v: float32(info.Pos.Min.Y) / float32(d.data.Dy),
})
strbuf.vs = append(strbuf.vs, dictVert{
x: xright,
y: ybot,
u: float32(info.Pos.Max.X) / float32(d.data.Dx),
v: float32(info.Pos.Max.Y) / float32(d.data.Dy),
})
x_pos += float32(info.Advance)
}
gl.GenBuffers(1, (*gl.Uint)(&strbuf.vbuffer))
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(strbuf.vbuffer))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(int(size)*len(strbuf.vs)), gl.Pointer(&strbuf.vs[0].x), gl.STATIC_DRAW)
gl.GenBuffers(1, (*gl.Uint)(&strbuf.ibuffer))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(strbuf.ibuffer))
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(strbuf.is[0]))*len(strbuf.is)), gl.Pointer(&strbuf.is[0]), gl.STATIC_DRAW)
d.strs[s] = strbuf
}
func (d *Door) setupGlStuff(room *Room) {
var state doorState
state.facing = d.Facing
state.pos = d.Pos
state.room.x = room.X
state.room.y = room.Y
state.room.dx = room.roomDef.Size.Dx
state.room.dy = room.roomDef.Size.Dy
if state == d.state {
return
}
if d.TextureData().Dy() == 0 {
// Can't build this data until the texture is loaded, so we'll have to try
// again later.
return
}
d.state = state
if d.threshold_glids.vbuffer != 0 {
gl.DeleteBuffers(1, (*gl.Uint)(&d.threshold_glids.vbuffer))
gl.DeleteBuffers(1, (*gl.Uint)(&d.threshold_glids.floor_buffer))
d.threshold_glids.vbuffer = 0
d.threshold_glids.floor_buffer = 0
}
if d.door_glids.vbuffer != 0 {
gl.DeleteBuffers(1, (*gl.Uint)(&d.door_glids.vbuffer))
gl.DeleteBuffers(1, (*gl.Uint)(&d.door_glids.floor_buffer))
d.door_glids.vbuffer = 0
d.door_glids.floor_buffer = 0
}
// far left, near right, do threshold
// near left, far right, do threshold
// far left, far right, do door
var vs []roomVertex
if d.Facing == FarLeft || d.Facing == NearRight {
x1 := float32(d.Pos)
x2 := float32(d.Pos + d.Width)
var y1 float32 = -0.25
var y2 float32 = 0.25
if d.Facing == FarLeft {
y1 = float32(room.roomDef.Size.Dy)
y2 = float32(room.roomDef.Size.Dy) - 0.25
}
// los_x1 := (x1 + float32(room.X)) / LosTextureSize
vs = append(vs, roomVertex{x: x1, y: y1})
vs = append(vs, roomVertex{x: x1, y: y2})
vs = append(vs, roomVertex{x: x2, y: y2})
vs = append(vs, roomVertex{x: x2, y: y1})
for i := 0; i < 4; i++ {
vs[i].los_u = (y2 + float32(room.Y)) / LosTextureSize
vs[i].los_v = (vs[i].x + float32(room.X)) / LosTextureSize
}
}
if d.Facing == FarRight || d.Facing == NearLeft {
y1 := float32(d.Pos)
y2 := float32(d.Pos + d.Width)
var x1 float32 = -0.25
var x2 float32 = 0.25
if d.Facing == FarRight {
x1 = float32(room.roomDef.Size.Dx)
x2 = float32(room.roomDef.Size.Dx) - 0.25
}
// los_y1 := (y1 + float32(room.Y)) / LosTextureSize
vs = append(vs, roomVertex{x: x1, y: y1})
vs = append(vs, roomVertex{x: x1, y: y2})
vs = append(vs, roomVertex{x: x2, y: y2})
vs = append(vs, roomVertex{x: x2, y: y1})
for i := 0; i < 4; i++ {
vs[i].los_u = (vs[i].y + float32(room.Y)) / LosTextureSize
vs[i].los_v = (x2 + float32(room.X)) / LosTextureSize
}
}
dz := -float32(d.Width*d.TextureData().Dy()) / float32(d.TextureData().Dx())
if d.Facing == FarRight {
x := float32(room.roomDef.Size.Dx)
y1 := float32(d.Pos + d.Width)
y2 := float32(d.Pos)
los_v := (float32(room.X) + x - 0.5) / LosTextureSize
los_u1 := (float32(room.Y) + y1) / LosTextureSize
los_u2 := (float32(room.Y) + y2) / LosTextureSize
vs = append(vs, roomVertex{
x: x, y: y1, z: 0,
u: 0, v: 1,
los_u: los_u1,
los_v: los_v,
})
vs = append(vs, roomVertex{
x: x, y: y1, z: dz,
u: 0, v: 0,
los_u: los_u1,
los_v: los_v,
})
vs = append(vs, roomVertex{
x: x, y: y2, z: dz,
u: 1, v: 0,
los_u: los_u2,
los_v: los_v,
})
vs = append(vs, roomVertex{
x: x, y: y2, z: 0,
u: 1, v: 1,
los_u: los_u2,
los_v: los_v,
})
}
if d.Facing == FarLeft {
x1 := float32(d.Pos)
x2 := float32(d.Pos + d.Width)
y := float32(room.roomDef.Size.Dy)
los_v1 := (float32(room.X) + x1) / LosTextureSize
los_v2 := (float32(room.X) + x2) / LosTextureSize
los_u := (float32(room.Y) + y - 0.5) / LosTextureSize
vs = append(vs, roomVertex{
x: x1, y: y, z: 0,
u: 0, v: 1,
los_u: los_u,
los_v: los_v1,
})
vs = append(vs, roomVertex{
x: x1, y: y, z: dz,
u: 0, v: 0,
los_u: los_u,
los_v: los_v1,
})
vs = append(vs, roomVertex{
x: x2, y: y, z: dz,
u: 1, v: 0,
los_u: los_u,
los_v: los_v2,
})
vs = append(vs, roomVertex{
x: x2, y: y, z: 0,
u: 1, v: 1,
los_u: los_u,
los_v: los_v2,
})
}
gl.GenBuffers(1, (*gl.Uint)(&d.threshold_glids.vbuffer))
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(d.threshold_glids.vbuffer))
size := int(unsafe.Sizeof(roomVertex{}))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(size*len(vs)), gl.Pointer(&vs[0].x), gl.STATIC_DRAW)
is := []uint16{0, 1, 2, 0, 2, 3}
gl.GenBuffers(1, (*gl.Uint)(&d.threshold_glids.floor_buffer))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(d.threshold_glids.floor_buffer))
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
d.threshold_glids.floor_count = 6
if d.Facing == FarLeft || d.Facing == FarRight {
is2 := []uint16{4, 5, 6, 4, 6, 7}
gl.GenBuffers(1, (*gl.Uint)(&d.door_glids.floor_buffer))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(d.door_glids.floor_buffer))
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is2)), gl.Pointer(&is2[0]), gl.STATIC_DRAW)
d.door_glids.floor_count = 6
}
}
func (room *Room) setupGlStuff() {
if room.X == room.gl.x &&
room.Y == room.gl.y &&
room.Size.Dx == room.gl.dx &&
room.Size.Dy == room.gl.dy &&
room.Wall.Data().Dx() == room.gl.wall_tex_dx &&
room.Wall.Data().Dy() == room.gl.wall_tex_dy {
return
}
room.gl.x = room.X
room.gl.y = room.Y
room.gl.dx = room.Size.Dx
room.gl.dy = room.Size.Dy
room.gl.wall_tex_dx = room.Wall.Data().Dx()
room.gl.wall_tex_dy = room.Wall.Data().Dy()
if room.vbuffer != 0 {
gl.DeleteBuffers(1, (*gl.Uint)(&room.vbuffer))
gl.DeleteBuffers(1, (*gl.Uint)(&room.left_buffer))
gl.DeleteBuffers(1, (*gl.Uint)(&room.right_buffer))
gl.DeleteBuffers(1, (*gl.Uint)(&room.floor_buffer))
}
dx := float32(room.Size.Dx)
dy := float32(room.Size.Dy)
var dz float32
if room.Wall.Data().Dx() > 0 {
dz = -float32(room.Wall.Data().Dy()*(room.Size.Dx+room.Size.Dy)) / float32(room.Wall.Data().Dx())
}
// Conveniently casted values
frx := float32(room.X)
fry := float32(room.Y)
frdx := float32(room.Size.Dx)
frdy := float32(room.Size.Dy)
// c is the u-texcoord of the corner of the room
c := frdx / (frdx + frdy)
// lt_llx := frx / LosTextureSize
// lt_lly := fry / LosTextureSize
// lt_urx := (frx + frdx) / LosTextureSize
// lt_ury := (fry + frdy) / LosTextureSize
lt_llx_ep := (frx + 0.5) / LosTextureSize
lt_lly_ep := (fry + 0.5) / LosTextureSize
lt_urx_ep := (frx + frdx - 0.5) / LosTextureSize
lt_ury_ep := (fry + frdy - 0.5) / LosTextureSize
vs := []roomVertex{
// Walls
{0, dy, 0, 0, 1, lt_ury_ep, lt_llx_ep},
{dx, dy, 0, c, 1, lt_ury_ep, lt_urx_ep},
{dx, 0, 0, 1, 1, lt_lly_ep, lt_urx_ep},
{0, dy, dz, 0, 0, lt_ury_ep, lt_llx_ep},
{dx, dy, dz, c, 0, lt_ury_ep, lt_urx_ep},
{dx, 0, dz, 1, 0, lt_lly_ep, lt_urx_ep},
// Floor
// This is the bulk of the floor, containing all but the outer edges of
// the room. los_tex can map directly onto this so we don't need to do
// anything weird here.
{0.5, 0.5, 0, 0.5 / dx, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{0.5, dy - 0.5, 0, 0.5 / dx, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{dx - 0.5, dy - 0.5, 0, 1 - 0.5/dx, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{dx - 0.5, 0.5, 0, 1 - 0.5/dx, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{0, 0.5, 0, 0, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{0, dy - 0.5, 0, 0, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{0.5, dy - 0.5, 0, 0.5 / dx, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{0.5, 0.5, 0, 0.5 / dx, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{0.5, 0, 0, 0.5 / dx, 1, lt_lly_ep, lt_llx_ep},
{0.5, 0.5, 0, 0.5 / dx, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{dx - 0.5, 0.5, 0, 1 - 0.5/dx, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{dx - 0.5, 0, 0, 1 - 0.5/dx, 1, lt_lly_ep, lt_urx_ep},
{dx - 0.5, 0.5, 0, 1 - 0.5/dx, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{dx - 0.5, dy - 0.5, 0, 1 - 0.5/dx, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{dx, dy - 0.5, 0, 1, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{dx, 0.5, 0, 1, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{0.5, dy - 0.5, 0, 0.5 / dx, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{0.5, dy, 0, 0.5 / dx, 0, lt_ury_ep, lt_llx_ep},
{dx - 0.5, dy, 0, 1 - 0.5/dx, 0, lt_ury_ep, lt_urx_ep},
{dx - 0.5, dy - 0.5, 0, 1 - 0.5/dx, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{0, 0, 0, 0, 1, lt_lly_ep, lt_llx_ep},
{0, 0.5, 0, 0, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{0.5, 0.5, 0, 0.5 / dx, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{0.5, 0, 0, 0.5 / dx, 1, lt_lly_ep, lt_llx_ep},
{0, dy - 0.5, 0, 0, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{0, dy, 0, 0, 0, lt_ury_ep, lt_llx_ep},
{0.5, dy, 0, 0.5 / dx, 0, lt_ury_ep, lt_llx_ep},
{0.5, dy - 0.5, 0, 0.5 / dx, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{dx - 0.5, dy - 0.5, 0, 1 - 0.5/dx, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{dx - 0.5, dy, 0, 1 - 0.5/dx, 0, lt_ury_ep, lt_urx_ep},
{dx, dy, 0, 1, 0, lt_ury_ep, lt_urx_ep},
{dx, dy - 0.5, 0, 1, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{dx - 0.5, 0, 0, 1 - 0.5/dx, 1, lt_lly_ep, lt_urx_ep},
{dx - 0.5, 0.5, 0, 1 - 0.5/dx, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{dx, 0.5, 0, 1, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{dx, 0, 0, 1, 1, lt_lly_ep, lt_urx_ep},
}
gl.GenBuffers(1, (*gl.Uint)(&room.vbuffer))
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(room.vbuffer))
size := int(unsafe.Sizeof(roomVertex{}))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(size*len(vs)), gl.Pointer(&vs[0].x), gl.STATIC_DRAW)
// left wall indices
is := []uint16{0, 3, 4, 0, 4, 1}
gl.GenBuffers(1, (*gl.Uint)(&room.left_buffer))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(room.left_buffer))
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
// right wall indices
is = []uint16{1, 4, 5, 1, 5, 2}
gl.GenBuffers(1, (*gl.Uint)(&room.right_buffer))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(room.right_buffer))
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
// floor indices
is = []uint16{
6, 7, 8, 6, 8, 9, // middle
10, 11, 12, 10, 12, 13, // left side
14, 15, 16, 14, 16, 17, // bottom side
18, 19, 20, 18, 20, 21, // right side
22, 23, 24, 22, 24, 25, // top side
26, 27, 28, 26, 28, 29, // bottom left corner
30, 31, 32, 30, 32, 33, // upper left corner
34, 35, 36, 34, 36, 37, // upper right corner
38, 39, 40, 38, 40, 41, // lower right corner
}
gl.GenBuffers(1, (*gl.Uint)(&room.floor_buffer))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(room.floor_buffer))
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
room.floor_count = len(is)
}
func (wt *WallTexture) setupGlStuff(x, y, dx, dy int, gl_ids *wallTextureGlIds) {
if gl_ids.vbuffer != 0 {
gl.DeleteBuffers(1, (*gl.Uint)(&gl_ids.vbuffer))
gl.DeleteBuffers(1, (*gl.Uint)(&gl_ids.left_buffer))
gl.DeleteBuffers(1, (*gl.Uint)(&gl_ids.right_buffer))
gl.DeleteBuffers(1, (*gl.Uint)(&gl_ids.floor_buffer))
gl_ids.vbuffer = 0
gl_ids.left_buffer = 0
gl_ids.right_buffer = 0
gl_ids.floor_buffer = 0
}
// All vertices for both walls and the floor will go here and get sent to
// opengl all at once
var vs []roomVertex
// Conveniently casted values
frx := float32(x)
fry := float32(y)
frdx := float32(dx)
frdy := float32(dy)
tdx := float32(wt.Texture.Data().Dx()) / 100
tdy := float32(wt.Texture.Data().Dy()) / 100
wtx := wt.X
wty := wt.Y
wtr := wt.Rot
if wtx > frdx {
wtr -= 3.1415926535 / 2
}
// Floor
verts := []mathgl.Vec2{
{-tdx / 2, -tdy / 2},
{-tdx / 2, tdy / 2},
{tdx / 2, tdy / 2},
{tdx / 2, -tdy / 2},
}
var m, run mathgl.Mat3
run.Identity()
m.Translation(wtx, wty)
run.Multiply(&m)
m.RotationZ(wtr)
run.Multiply(&m)
if wt.Flip {
m.Scaling(-1, 1)
run.Multiply(&m)
}
for i := range verts {
verts[i].Transform(&run)
}
p := mathgl.Poly(verts)
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{0, 0}, B: mathgl.Vec2{0, frdy}})
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{0, frdy}, B: mathgl.Vec2{frdx, frdy}})
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{frdx, frdy}, B: mathgl.Vec2{frdx, 0}})
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{frdx, 0}, B: mathgl.Vec2{0, 0}})
if len(p) >= 3 {
// floor indices
var is []uint16
for i := 1; i < len(p)-1; i++ {
is = append(is, uint16(len(vs)+0))
is = append(is, uint16(len(vs)+i))
is = append(is, uint16(len(vs)+i+1))
}
gl.GenBuffers(1, (*gl.Uint)(&gl_ids.floor_buffer))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(gl_ids.floor_buffer))
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
gl_ids.floor_count = gl.Sizei(len(is))
run.Inverse()
for i := range p {
v := mathgl.Vec2{p[i].X, p[i].Y}
v.Transform(&run)
vs = append(vs, roomVertex{
x: p[i].X,
y: p[i].Y,
u: v.X/tdx + 0.5,
v: -(v.Y/tdy + 0.5),
los_u: (fry + p[i].Y) / LosTextureSize,
los_v: (frx + p[i].X) / LosTextureSize,
})
}
}
// Left Wall
verts = []mathgl.Vec2{
{-tdx / 2, -tdy / 2},
{-tdx / 2, tdy / 2},
{tdx / 2, tdy / 2},
{tdx / 2, -tdy / 2},
}
run.Identity()
m.Translation(wtx, wty)
run.Multiply(&m)
m.RotationZ(wtr)
run.Multiply(&m)
if wt.Flip {
m.Scaling(-1, 1)
run.Multiply(&m)
}
for i := range verts {
verts[i].Transform(&run)
}
p = mathgl.Poly(verts)
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{0, 0}, B: mathgl.Vec2{0, frdy}})
p.Clip(&mathgl.Seg2{B: mathgl.Vec2{0, frdy}, A: mathgl.Vec2{frdx, frdy}})
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{frdx, frdy}, B: mathgl.Vec2{frdx, 0}})
if len(p) >= 3 {
// floor indices
var is []uint16
for i := 1; i < len(p)-1; i++ {
is = append(is, uint16(len(vs)+0))
is = append(is, uint16(len(vs)+i))
is = append(is, uint16(len(vs)+i+1))
}
gl.GenBuffers(1, (*gl.Uint)(&gl_ids.left_buffer))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(gl_ids.left_buffer))
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
gl_ids.left_count = gl.Sizei(len(is))
run.Inverse()
for i := range p {
v := mathgl.Vec2{p[i].X, p[i].Y}
v.Transform(&run)
vs = append(vs, roomVertex{
x: p[i].X,
y: frdy,
z: frdy - p[i].Y,
u: v.X/tdx + 0.5,
v: -(v.Y/tdy + 0.5),
los_u: (fry + frdy - 0.5) / LosTextureSize,
los_v: (frx + p[i].X) / LosTextureSize,
})
}
}
// Right Wall
verts = []mathgl.Vec2{
{-tdx / 2, -tdy / 2},
{-tdx / 2, tdy / 2},
{tdx / 2, tdy / 2},
{tdx / 2, -tdy / 2},
}
run.Identity()
m.Translation(wtx, wty)
run.Multiply(&m)
m.RotationZ(wtr)
run.Multiply(&m)
if wt.Flip {
m.Scaling(-1, 1)
run.Multiply(&m)
}
for i := range verts {
verts[i].Transform(&run)
}
p = mathgl.Poly(verts)
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{0, frdy}, B: mathgl.Vec2{frdx, frdy}})
p.Clip(&mathgl.Seg2{B: mathgl.Vec2{frdx, frdy}, A: mathgl.Vec2{frdx, 0}})
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{frdx, 0}, B: mathgl.Vec2{0, 0}})
if len(p) >= 3 {
// floor indices
var is []uint16
for i := 1; i < len(p)-1; i++ {
is = append(is, uint16(len(vs)+0))
is = append(is, uint16(len(vs)+i))
is = append(is, uint16(len(vs)+i+1))
}
gl.GenBuffers(1, (*gl.Uint)(&gl_ids.right_buffer))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(gl_ids.right_buffer))
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
gl_ids.right_count = gl.Sizei(len(is))
run.Inverse()
for i := range p {
v := mathgl.Vec2{p[i].X, p[i].Y}
v.Transform(&run)
vs = append(vs, roomVertex{
x: frdx,
y: p[i].Y,
z: frdx - p[i].X,
u: v.X/tdx + 0.5,
v: -(v.Y/tdy + 0.5),
los_u: (fry + p[i].Y) / LosTextureSize,
los_v: (frx + frdx - 0.5) / LosTextureSize,
})
}
}
if len(vs) > 0 {
gl.GenBuffers(1, (*gl.Uint)(&gl_ids.vbuffer))
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(gl_ids.vbuffer))
size := int(unsafe.Sizeof(roomVertex{}))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(size*len(vs)), gl.Pointer(&vs[0].x), gl.STATIC_DRAW)
}
}