func renderSwitch(s *Switch) {
gl.LoadIdentity()
// TODO constant
v := SwitchSize / 2
x, y := float32(s.X+v), float32(s.Y+v)
gl.Translatef(x, y, 0)
// Render the switch
gl.Color3f(1, 1, 1)
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex2d(0, 0)
vv := float64(v)
for i := float64(0); i <= SwitchSegments; i++ {
a := 2 * math.Pi * i / SwitchSegments
gl.Vertex2d(math.Sin(a)*vv, math.Cos(a)*vv)
}
gl.End()
if LineWidth != 0 {
// Render the shape
gl.Color3i(0, 0, 0)
gl.LineWidth(LineWidth)
gl.Begin(gl.LINE_LOOP)
for i := float64(0); i <= SwitchSegments; i++ {
a := 2 * math.Pi * i / SwitchSegments
gl.Vertex2d(math.Sin(a)*vv, math.Cos(a)*vv)
}
gl.End()
}
// Write the switch name
gl.LoadIdentity()
w, h := fonts[6].Metrics(s.name)
gl.Color3i(0, 0, 0)
fonts[6].Printf(x-float32(w)/2, y-float32(h)/2+2, s.name)
}
func renderCorner(color ColorDef, ww, hh, start float64, radius, lineWidth float32) {
setColor(color)
max := BlockCornerSegments * (start + 1)
// Render the corner
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex2d(ww, hh)
for i := start * BlockCornerSegments; i <= max; i++ {
a := math.Pi / 2 * i / BlockCornerSegments
x := math.Cos(a) * float64(radius)
y := math.Sin(a) * float64(radius)
gl.Vertex2d(ww+x, hh+y)
}
gl.End()
if lineWidth != 0 {
// Render the shape
gl.LineWidth(lineWidth)
gl.Color3i(0, 0, 0)
gl.Begin(gl.LINE_STRIP)
for i := start * BlockCornerSegments; i <= max; i++ {
a := math.Pi / 2 * i / BlockCornerSegments
x := math.Cos(a) * float64(radius)
y := math.Sin(a) * float64(radius)
gl.Vertex2d(ww+x, hh+y)
}
gl.End()
}
}
// Used in classic render mode.
// Defines vertex colors.
func (a *Attr) color(i int) {
i *= a.size
switch a.size {
case 3:
switch v := a.data.(type) {
case []int8:
gl.Color3b(v[i], v[i+1], v[i+2])
case []uint8:
gl.Color3ub(v[i], v[i+1], v[i+2])
case []int16:
gl.Color3s(v[i], v[i+1], v[i+2])
case []int32:
gl.Color3i(int(v[i]), int(v[i+1]), int(v[i+2]))
case []float32:
gl.Color3f(v[i], v[i+1], v[i+2])
case []float64:
gl.Color3d(v[i], v[i+1], v[i+2])
}
case 4:
switch v := a.data.(type) {
case []int8:
gl.Color4b(v[i], v[i+1], v[i+2], v[i+3])
case []uint8:
gl.Color4ub(v[i], v[i+1], v[i+2], v[i+3])
case []int16:
gl.Color4s(v[i], v[i+1], v[i+2], v[i+3])
case []int32:
gl.Color4i(int(v[i]), int(v[i+1]), int(v[i+2]), int(v[i+3]))
case []float32:
gl.Color4f(v[i], v[i+1], v[i+2], v[i+3])
case []float64:
gl.Color4d(v[i], v[i+1], v[i+2], v[i+3])
}
}
}
func renderBlock_(color ColorDef, w, h, radius, lineWidth float32) {
setColor(color)
gl.Begin(gl.QUADS)
// Render inner square
gl.Vertex2f(radius, radius)
gl.Vertex2f(radius, h-radius)
gl.Vertex2f(w-radius, h-radius)
gl.Vertex2f(w-radius, radius)
// Render top square
gl.Vertex2f(radius, h-radius)
gl.Vertex2f(radius, h)
gl.Vertex2f(w-radius, h)
gl.Vertex2f(w-radius, h-radius)
// Render bottom square
gl.Vertex2f(radius, radius)
gl.Vertex2f(radius, 0)
gl.Vertex2f(w-radius, 0)
gl.Vertex2f(w-radius, radius)
// Render left square
gl.Vertex2f(w-radius, radius)
gl.Vertex2f(w, radius)
gl.Vertex2f(w, h-radius)
gl.Vertex2f(w-radius, h-radius)
// Render right square
gl.Vertex2f(radius, radius)
gl.Vertex2f(0, radius)
gl.Vertex2f(0, h-radius)
gl.Vertex2f(radius, h-radius)
gl.End()
// Render bottom right corner
ww, hh := float64(w-radius), float64(h-radius)
renderCorner(color, ww, hh, 0, radius, lineWidth)
// Render bottom left corner
ww, hh = float64(radius), float64(h-radius)
renderCorner(color, ww, hh, 1, radius, lineWidth)
// Render top left corner
ww, hh = float64(radius), float64(radius)
renderCorner(color, ww, hh, 2, radius, lineWidth)
// Render top right corner
ww, hh = float64(w-radius), float64(radius)
renderCorner(color, ww, hh, 3, radius, lineWidth)
if lineWidth != 0 {
// Render the shape
gl.LineWidth(lineWidth)
gl.Color3i(0, 0, 0)
gl.Begin(gl.LINES)
gl.Vertex2f(radius, 0)
gl.Vertex2f(w-radius, 0)
gl.Vertex2f(0, radius)
gl.Vertex2f(0, h-radius)
gl.Vertex2f(w, radius)
gl.Vertex2f(w, h-radius)
gl.Vertex2f(radius, h)
gl.Vertex2f(w-radius, h)
gl.End()
}
gl.PopMatrix()
}