// Distance to Plane(Point?)? WTF IS THIS!?
func d2p(tmat mathgl.Mat4, point, ray mathgl.Vec3) float32 {
var mat mathgl.Mat4
mat.Assign(&tmat)
var sub mathgl.Vec3
sub.X = mat[12]
sub.Y = mat[13]
sub.Z = mat[14]
mat[12], mat[13], mat[14] = 0, 0, 0
point.Subtract(&sub)
point.Scale(-1)
ray.Normalize()
dist := point.Dot(mat.GetForwardVec3())
var forward mathgl.Vec3
forward.Assign(mat.GetForwardVec3())
cos := float64(forward.Dot(&ray))
return dist / float32(cos)
}
// Need floor, right wall, and left wall matrices to draw the details
func (room *Room) render(floor, left, right mathgl.Mat4, zoom float32, base_alpha byte, drawables []Drawable, los_tex *LosTexture, floor_drawers []FloorDrawer) {
do_color := func(r, g, b, a byte) {
R, G, B, A := room.Color()
A = alphaMult(A, base_alpha)
gl.Color4ub(alphaMult(R, r), alphaMult(G, g), alphaMult(B, b), alphaMult(A, a))
}
gl.Enable(gl.TEXTURE_2D)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.STENCIL_TEST)
gl.ClearStencil(0)
gl.Clear(gl.STENCIL_BUFFER_BIT)
gl.EnableClientState(gl.VERTEX_ARRAY)
gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
defer gl.DisableClientState(gl.VERTEX_ARRAY)
defer gl.DisableClientState(gl.TEXTURE_COORD_ARRAY)
var vert roomVertex
planes := []plane{
{room.left_buffer, room.Wall, &left},
{room.right_buffer, room.Wall, &right},
{room.floor_buffer, room.Floor, &floor},
}
gl.PushMatrix()
defer gl.PopMatrix()
if los_tex != nil {
gl.LoadMatrixf(&floor[0])
gl.ClientActiveTexture(gl.TEXTURE1)
gl.ActiveTexture(gl.TEXTURE1)
gl.Enable(gl.TEXTURE_2D)
gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
los_tex.Bind()
gl.BindBuffer(gl.ARRAY_BUFFER, room.vbuffer)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
gl.ClientActiveTexture(gl.TEXTURE0)
gl.ActiveTexture(gl.TEXTURE0)
base.EnableShader("los")
base.SetUniformI("los", "tex2", 1)
}
var mul, run mathgl.Mat4
for _, plane := range planes {
gl.LoadMatrixf(&floor[0])
run.Assign(&floor)
// Render the doors and cut out the stencil buffer so we leave them empty
// if they're open
switch plane.mat {
case &left:
gl.StencilFunc(gl.ALWAYS, 1, 1)
gl.StencilOp(gl.REPLACE, gl.REPLACE, gl.REPLACE)
for _, door := range room.Doors {
if door.Facing != FarLeft {
continue
}
door.TextureData().Bind()
R, G, B, A := door.Color()
do_color(R, G, B, alphaMult(A, room.far_left.wall_alpha))
gl.ClientActiveTexture(gl.TEXTURE0)
door.TextureData().Bind()
if door.door_glids.floor_buffer != 0 {
gl.BindBuffer(gl.ARRAY_BUFFER, door.threshold_glids.vbuffer)
gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, door.door_glids.floor_buffer)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
gl.ClientActiveTexture(gl.TEXTURE1)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
gl.DrawElements(gl.TRIANGLES, door.door_glids.floor_count, gl.UNSIGNED_SHORT, nil)
}
}
gl.StencilFunc(gl.NOTEQUAL, 1, 1)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.KEEP)
do_color(255, 255, 255, room.far_left.wall_alpha)
case &right:
gl.StencilFunc(gl.ALWAYS, 1, 1)
gl.StencilOp(gl.REPLACE, gl.REPLACE, gl.REPLACE)
for _, door := range room.Doors {
if door.Facing != FarRight {
continue
}
door.TextureData().Bind()
R, G, B, A := door.Color()
do_color(R, G, B, alphaMult(A, room.far_right.wall_alpha))
gl.ClientActiveTexture(gl.TEXTURE0)
door.TextureData().Bind()
if door.door_glids.floor_buffer != 0 {
gl.BindBuffer(gl.ARRAY_BUFFER, door.threshold_glids.vbuffer)
gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, door.door_glids.floor_buffer)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
gl.ClientActiveTexture(gl.TEXTURE1)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
gl.DrawElements(gl.TRIANGLES, door.door_glids.floor_count, gl.UNSIGNED_SHORT, nil)
}
}
gl.StencilFunc(gl.NOTEQUAL, 1, 1)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.KEEP)
do_color(255, 255, 255, room.far_right.wall_alpha)
case &floor:
gl.StencilFunc(gl.ALWAYS, 2, 2)
gl.StencilOp(gl.REPLACE, gl.REPLACE, gl.REPLACE)
do_color(255, 255, 255, 255)
}
gl.ClientActiveTexture(gl.TEXTURE0)
gl.BindBuffer(gl.ARRAY_BUFFER, room.vbuffer)
gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
gl.ClientActiveTexture(gl.TEXTURE1)
if los_tex != nil {
los_tex.Bind()
}
gl.BindBuffer(gl.ARRAY_BUFFER, room.vbuffer)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
// Now draw the walls
gl.LoadMatrixf(&floor[0])
plane.texture.Data().Bind()
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, plane.index_buffer)
if (plane.mat == &left || plane.mat == &right) && strings.Contains(string(room.Wall.Path), "gradient.png") {
base.EnableShader("gorey")
base.SetUniformI("gorey", "tex", 0)
base.SetUniformI("gorey", "foo", Foo)
base.SetUniformF("gorey", "num_rows", Num_rows)
base.SetUniformF("gorey", "noise_rate", Noise_rate)
base.SetUniformF("gorey", "num_steps", Num_steps)
}
if plane.mat == &floor && strings.Contains(string(room.Floor.Path), "gradient.png") {
base.EnableShader("gorey")
base.SetUniformI("gorey", "tex", 0)
base.SetUniformI("gorey", "foo", Foo)
base.SetUniformF("gorey", "num_rows", Num_rows)
base.SetUniformF("gorey", "noise_rate", Noise_rate)
base.SetUniformF("gorey", "num_steps", Num_steps)
zexp := math.Log(float64(zoom))
frac := 1 - 1/zexp
frac = (frac - 0.6) * 5.0
switch {
case frac > 0.7:
base.SetUniformI("gorey", "range", 1)
case frac > 0.3:
base.SetUniformI("gorey", "range", 2)
default:
base.SetUniformI("gorey", "range", 3)
}
}
if plane.mat == &floor {
R, G, B, _ := room.Color()
gl.Color4ub(R, G, B, 255)
}
gl.DrawElements(gl.TRIANGLES, gl.Sizei(room.floor_count), gl.UNSIGNED_SHORT, nil)
if los_tex != nil {
base.EnableShader("los")
} else {
base.EnableShader("")
}
}
for _, wt := range room.WallTextures {
if room.wall_texture_gl_map == nil {
room.wall_texture_gl_map = make(map[*WallTexture]wallTextureGlIds)
room.wall_texture_state_map = make(map[*WallTexture]wallTextureState)
}
ids := room.wall_texture_gl_map[wt]
state := room.wall_texture_state_map[wt]
var new_state wallTextureState
new_state.flip = wt.Flip
new_state.rot = wt.Rot
new_state.x = wt.X
new_state.y = wt.Y
new_state.room.x = room.X
new_state.room.y = room.Y
new_state.room.dx = room.Size.Dx
new_state.room.dy = room.Size.Dy
if new_state != state {
wt.setupGlStuff(room.X, room.Y, room.Size.Dx, room.Size.Dy, &ids)
room.wall_texture_gl_map[wt] = ids
room.wall_texture_state_map[wt] = new_state
}
gl.LoadMatrixf(&floor[0])
if ids.vbuffer != 0 {
wt.Texture.Data().Bind()
R, G, B, A := wt.Color()
gl.ClientActiveTexture(gl.TEXTURE0)
gl.BindBuffer(gl.ARRAY_BUFFER, ids.vbuffer)
gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
gl.ClientActiveTexture(gl.TEXTURE1)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
gl.ClientActiveTexture(gl.TEXTURE0)
if ids.floor_buffer != 0 {
gl.StencilFunc(gl.ALWAYS, 2, 2)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ids.floor_buffer)
gl.Color4ub(R, G, B, A)
gl.DrawElements(gl.TRIANGLES, ids.floor_count, gl.UNSIGNED_SHORT, nil)
}
if ids.left_buffer != 0 {
gl.StencilFunc(gl.ALWAYS, 1, 1)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ids.left_buffer)
do_color(R, G, B, alphaMult(A, room.far_left.wall_alpha))
gl.DrawElements(gl.TRIANGLES, ids.left_count, gl.UNSIGNED_SHORT, nil)
}
if ids.right_buffer != 0 {
gl.StencilFunc(gl.ALWAYS, 1, 1)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ids.right_buffer)
do_color(R, G, B, alphaMult(A, room.far_right.wall_alpha))
gl.DrawElements(gl.TRIANGLES, ids.right_count, gl.UNSIGNED_SHORT, nil)
}
}
}
base.EnableShader("marble")
base.SetUniformI("marble", "tex2", 1)
base.SetUniformF("marble", "room_x", float32(room.X))
base.SetUniformF("marble", "room_y", float32(room.Y))
for _, door := range room.Doors {
door.setupGlStuff(room)
if door.threshold_glids.vbuffer == 0 {
continue
}
if door.AlwaysOpen() {
continue
}
if door.highlight_threshold {
gl.Color4ub(255, 255, 255, 255)
} else {
gl.Color4ub(128, 128, 128, 255)
}
gl.BindBuffer(gl.ARRAY_BUFFER, door.threshold_glids.vbuffer)
gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
gl.ClientActiveTexture(gl.TEXTURE1)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
gl.ClientActiveTexture(gl.TEXTURE0)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, door.threshold_glids.floor_buffer)
gl.DrawElements(gl.TRIANGLES, door.threshold_glids.floor_count, gl.UNSIGNED_SHORT, nil)
}
base.EnableShader("")
if los_tex != nil {
base.EnableShader("")
gl.ActiveTexture(gl.TEXTURE1)
gl.Disable(gl.TEXTURE_2D)
gl.ActiveTexture(gl.TEXTURE0)
gl.ClientActiveTexture(gl.TEXTURE1)
gl.DisableClientState(gl.TEXTURE_COORD_ARRAY)
gl.ClientActiveTexture(gl.TEXTURE0)
}
run.Assign(&floor)
mul.Translation(float32(-room.X), float32(-room.Y), 0)
run.Multiply(&mul)
gl.LoadMatrixf(&run[0])
gl.StencilFunc(gl.EQUAL, 2, 3)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.KEEP)
room_rect := image.Rect(room.X, room.Y, room.X+room.Size.Dx, room.Y+room.Size.Dy)
for _, fd := range floor_drawers {
x, y := fd.Pos()
dx, dy := fd.Dims()
if room_rect.Overlaps(image.Rect(x, y, x+dx, y+dy)) {
fd.RenderOnFloor()
}
}
do_color(255, 255, 255, 255)
gl.LoadIdentity()
gl.Disable(gl.STENCIL_TEST)
room.renderFurniture(floor, 255, drawables, los_tex)
gl.ClientActiveTexture(gl.TEXTURE1)
gl.Disable(gl.TEXTURE_2D)
gl.ClientActiveTexture(gl.TEXTURE0)
base.EnableShader("")
}