func Write(f Figure, a uint, V, N []*vect.Imp, c col.Colour) {
//
switch f {
case UNDEF:
nn = 0 // forces glEnd / glBegin
println("gl.Write UNDEF")
return
case LIGHT:
lightVis = true
if a >= MaxL {
ker.Stop(pack, 2)
}
InitLight(a, V[0], N[0], c)
nn = 0
println("gl.Write LIGHT")
return
}
if f != fig || a != nn || nn == 0 {
fig = f
nn = a
C.glEnd()
C.glBegin(C.GLenum(f))
}
C.glColor3ub(C.GLubyte(c.R), C.GLubyte(c.G), C.GLubyte(c.B))
for i := uint(0); i < a; i++ {
println("gl.Write", i)
vector2yyy(V[i])
C.glVertex3dv(&yyy[0])
vector2yyy(N[i])
C.glNormal3dv(&yyy[0])
}
/*
tmp:= vect.New ()
C.glEnd ()
for i:= uint(0); i < a; i++ {
C.glBegin (LINES)
C.glColor3ub (C.GLubyte(0), C.GLubyte(255), C.GLubyte(0))
vector2yyy (V[i]); C.glVertex3dv (&yyy[0])
tmp.Copy (V[i])
tmp.Inc (N[i])
vector2yyy (tmp); C.glVertex3dv (&yyy[0])
C.glEnd ()
}
nn = 0
C.glBegin (POINTS)
*/
}
func lamp(n uint) {
//
if !lightInitialized[n] {
return
}
xx, yy, zz := lightSource[n].Coord3()
x, y, z := C.GLdouble(xx), C.GLdouble(yy), C.GLdouble(zz)
r := C.GLdouble(0.1)
C.glBegin(TRIANGLE_FAN)
C.glColor3ub(C.GLubyte(lightColour[n].R), C.GLubyte(lightColour[n].G), C.GLubyte(lightColour[n].B))
C.glNormal3d(C.GLdouble(0.0), C.GLdouble(0.0), C.GLdouble(-1.0))
C.glVertex3d(C.GLdouble(x), C.GLdouble(y), C.GLdouble(z+r))
r0 := r * sin[1]
z0 := z + r*cos[1]
for l := 0; l <= nLamp; l++ {
C.glNormal3d(-sin[1]*cos[l], -sin[1]*sin[l], -cos[1])
C.glVertex3d(x+r0*cos[l], y+r0*sin[l], z0)
}
C.glEnd()
C.glBegin(QUAD_STRIP)
var r1, z1 C.GLdouble
for b := 1; b <= nLamp/2-2; b++ {
r0, z0 = r*sin[b], z+r*cos[b]
r1, z1 = r*sin[b+1], z+r*cos[b+1]
for l := 0; l <= nLamp; l++ {
C.glNormal3d(-sin[b+1]*cos[l], -sin[b+1]*sin[l], -cos[b+1])
C.glVertex3d(x+r1*cos[l], y+r1*sin[l], z1)
C.glNormal3d(-sin[b]*cos[l], -sin[b]*sin[l], -cos[b])
C.glVertex3d(x+r0*cos[l], y+r0*sin[l], z0)
}
}
C.glEnd()
C.glBegin(TRIANGLE_FAN)
C.glNormal3d(0., 0., 1.)
C.glVertex3d(x, y, z-r)
r0, z0 = r*sin[1], z-r*cos[1]
b := nLamp/2 - 1
for l := 0; l <= nLamp; l++ {
C.glNormal3d(-sin[b]*cos[l], -sin[b]*sin[l], -cos[b])
C.glVertex3d(x+r0*cos[l], y+r0*sin[l], z0)
}
C.glEnd()
}
//void glColor3ub (uint8 red, uint8 green, uint8 blue)
func Color3ub(red uint8, green uint8, blue uint8) {
C.glColor3ub(C.GLubyte(red), C.GLubyte(green), C.GLubyte(blue))
}