//void glMap1d (GLenum target, float64 u1, float64 u2, int stride, int order, const float64 *points)
func Map1d(target GLenum, u1 float64, u2 float64, stride int, order int, points []float64) {
if len(points) == 0 {
panic("Invalid points size")
}
C.glMap1d(C.GLenum(target), C.GLdouble(u1), C.GLdouble(u2),
C.GLint(stride), C.GLint(order), (*C.GLdouble)(&points[0]))
}
func Perspective(fovy, aspect, zNear, zFar float64) {
C.gluPerspective(
C.GLdouble(fovy),
C.GLdouble(aspect),
C.GLdouble(zNear),
C.GLdouble(zFar),
)
}
// Project object coordinates to screen coordinates.
func Project(objx, objy, objz float64, model, proj []float64, view []int32) (x, y, z float64) {
var wx, wy, wz C.GLdouble
C.gluProject(
C.GLdouble(objx), C.GLdouble(objy), C.GLdouble(objz), (*C.GLdouble)(&model[0]),
(*C.GLdouble)(&proj[0]), (*C.GLint)(&view[0]), &wx, &wy, &wz,
)
return float64(wx), float64(wy), float64(wz)
}
// Project screen coordinates to object coordinates.
func Unproject(wx, wy, wz float64, model, proj []float64, view []int32) (objx, objy, objz float64) {
var ox, oy, oz C.GLdouble
C.gluUnProject(
C.GLdouble(wx), C.GLdouble(wy), C.GLdouble(wz), (*C.GLdouble)(&model[0]),
(*C.GLdouble)(&proj[0]), (*C.GLint)(&view[0]), &ox, &oy, &oz,
)
return float64(ox), float64(oy), float64(oz)
}
//void glMap2d (GLenum target, float64 u1, float64 u2, int ustride, int uorder, float64 v1, float64 v2, int vstride, int vorder, const float64 *points)
func Map2d(target GLenum, u1 float64, u2 float64, ustride int, uorder int, v1 float64, v2 float64, vstride int, vorder int, points []float64) {
if len(points) == 0 {
panic("Invalid points size")
}
C.glMap2d(C.GLenum(target), C.GLdouble(u1), C.GLdouble(u2), C.GLint(ustride),
C.GLint(uorder), C.GLdouble(v1), C.GLdouble(v2), C.GLint(vstride),
C.GLint(vorder), (*C.GLdouble)(&points[0]))
}
func LookAt(eyeX, eyeY, eyeZ, centerX, centerY, centerZ, upX, upY, upZ float64) {
C.gluLookAt(
C.GLdouble(eyeX),
C.GLdouble(eyeY),
C.GLdouble(eyeZ),
C.GLdouble(centerX),
C.GLdouble(centerY),
C.GLdouble(centerZ),
C.GLdouble(upX),
C.GLdouble(upY),
C.GLdouble(upZ),
)
}
func init() {
//
right[0], front[1], top[2] = 1.0, 1.0, 1.0
matrix[3][3] = 1.
for l := 0; l < MaxL; l++ {
lightSource[l] = vect.New()
}
w := 2.0 * math.Pi / float64(nLamp)
sin[0], cos[0] = C.GLdouble(0.0), C.GLdouble(1.0)
sin[nLamp], cos[nLamp] = sin[0], cos[0]
for g := 1; g < nLamp; g++ {
sin[g] = C.GLdouble(math.Sin(float64(g) * w))
cos[g] = C.GLdouble(math.Cos(float64(g) * w))
}
sin[nLamp+1], sin[1] = cos[nLamp+1], cos[1]
// C.glDepthFunc (C.GL_LESS) // default
C.glEnable(C.GL_DEPTH_TEST)
C.glShadeModel(C.GL_SMOOTH)
for i := 0; i < 3; i++ {
lmAmb[i] = C.GLfloat(0.2)
} // default: 0.2
lmAmb[3] = C.GLfloat(1.0) // default: 1.0
C.glLightModelfv(C.GL_LIGHT_MODEL_AMBIENT, &lmAmb[0])
for i := 0; i < 3; i++ {
mAmbi[i] = C.GLfloat(0.2)
} // default: 0.2
mAmbi[3] = C.GLfloat(1.0) // default: 1.0
// C.glLightModelfv (C.GL_LIGHT_MODEL_TWO_SIDE, 1)
C.glMaterialfv(C.GL_FRONT_AND_BACK, C.GL_AMBIENT_AND_DIFFUSE, &mAmbi[0])
for i := 0; i < 3; i++ {
mDiff[i] = C.GLfloat(0.8)
} // default: 0.8
mDiff[3] = C.GLfloat(1.0) // default: 1.0
w = 1.
C.glClearDepth(C.GLclampd(w))
// C.glMaterialfv (C.GL_FRONT_AND_BACK, C.GL_DIFFUSE, mDiff)
// C.glColorMaterial (C.GL_FRONT_AND_BACK, C.GL_DIFFUSE)
// C.glColorMaterial (C.GL_FRONT, C.GL_AMBIENT)
C.glColorMaterial(C.GL_FRONT_AND_BACK, C.GL_AMBIENT_AND_DIFFUSE)
C.glEnable(C.GL_COLOR_MATERIAL)
C.glEnable(C.GL_LIGHTING)
initialize()
}
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()
}
func UnProject(winX, winY, winZ float64, model, proj *[16]float64, view *[4]int32) (float64, float64, float64) {
var ox, oy, oz C.GLdouble
m := (*C.GLdouble)(unsafe.Pointer(model))
p := (*C.GLdouble)(unsafe.Pointer(proj))
v := (*C.GLint)(unsafe.Pointer(view))
C.gluUnProject(
C.GLdouble(winX),
C.GLdouble(winY),
C.GLdouble(winZ),
m,
p,
v,
&ox,
&oy,
&oz,
)
return float64(ox), float64(oy), float64(oz)
}
func Init(fern float64) { // called by points.Start ()
//
const (
D = 2.0 // -fache Bildschirmbreite
nah = C.GLdouble(0.2)
)
if !initialized {
initialize()
}
C.glMatrixMode(C.GL_PROJECTION)
C.glLoadIdentity()
deg := D * math.Atan((0.5/D)/scr.Proportion())
deg /= 0.9 // experimentelle Weitwinkelkorrektur
var m [4][4]C.GLdouble
m[1][1] = 1.0 / C.GLdouble(math.Tan(deg)) // Cot
m[0][0] = m[1][1] / C.GLdouble(scr.Proportion())
// delta:= C.GLdouble(fern) - nah
// m[2][2] = - (C.GLdouble(fern) + nah) / delta
// m[2][3] = GLdouble(-1.0)
// m[3][2] = -2. * nah * C.GLdouble(fern) / delta
m[2][2] = C.GLdouble(-1.0)
m[2][3] = C.GLdouble(-1.0)
m[3][2] = C.GLdouble(-1.0) * nah
C.glMultMatrixd(&m[0][0])
// q:= C.GLdouble(0.75)
// GLFrustum (-1.0 * nah, 1.0 * nah, -q * nah, q * nah, 1.0 * nah, C.GLdouble(fern))
C.glMatrixMode(C.GL_MODELVIEW)
}
func Write0() {
//
if !initialized {
initialize()
}
if !scr.UnderX() {
ker.Stop(pack, 1)
}
C.glMatrixMode(C.GL_MODELVIEW)
C.glLoadIdentity()
for i := 0; i < 3; i++ {
matrix[i][0] = C.GLdouble(right[i])
matrix[i][1] = C.GLdouble(top[i])
matrix[i][2] = C.GLdouble(-front[i])
}
C.glMultMatrixd(&matrix[0][0])
C.glTranslated(C.GLdouble(-eye[0]), C.GLdouble(-eye[1]), C.GLdouble(-eye[2]))
C.glClear(C.GL_COLOR_BUFFER_BIT + C.GL_DEPTH_BUFFER_BIT)
for n := uint(0); n < MaxL; n++ {
if lightInitialized[n] {
ActualizeLight(n)
}
}
C.glBegin(POINTS)
nn = 0
}
// Project screen coordinates to object coordinates.
func Unproject4(wx, wy, wz, clipw float64, model, proj []float64, view []int32, near, far float64) (objx, objy, objz, objw float64) {
var ox, oy, oz, ow C.GLdouble
C.gluUnProject4(
C.GLdouble(wx), C.GLdouble(wy), C.GLdouble(wz), C.GLdouble(clipw),
(*C.GLdouble)(&model[0]), (*C.GLdouble)(&proj[0]), (*C.GLint)(&view[0]),
C.GLdouble(near), C.GLdouble(far), &ox, &oy, &oz, &ow,
)
return float64(ox), float64(oy), float64(oz), float64(ow)
}
//void glTexGend (GLenum coord, GLenum pname, float64 param)
func TexGend(coord GLenum, pname GLenum, param float64) {
C.glTexGend(C.GLenum(coord), C.GLenum(pname), C.GLdouble(param))
}
func Ortho2D(left, right, bottom, top float64) {
C.gluOrtho2D(C.GLdouble(left), C.GLdouble(right), C.GLdouble(bottom), C.GLdouble(top))
}
func PickMatrix(x, y, delx, dely float64, viewport []int32) {
C.gluPickMatrix(C.GLdouble(x), C.GLdouble(y), C.GLdouble(delx),
C.GLdouble(dely), (*C.GLint)(&viewport[0]))
}
func WireCube(size gl.GLdouble) {
C.glutWireCube(C.GLdouble(size))
}
func SolidCube(size gl.GLdouble) {
C.glutSolidCube(C.GLdouble(size))
}
func WireTorus(innerRadius, outerRadius gl.GLdouble, nsides, rings gl.GLint) {
C.glutWireTorus(C.GLdouble(innerRadius), C.GLdouble(outerRadius), C.GLint(nsides), C.GLint(rings))
}
// Set a property of the tesselator.
func (tess *Tesselator) Property(which gl.GLenum, data float64) {
C.gluTessProperty(tess.tess, C.GLenum(which), C.GLdouble(data))
}
func Cylinder(q unsafe.Pointer, base, top, height float32, slices, stacks int) {
C.gluCylinder((*[0]byte)(q), C.GLdouble(base), C.GLdouble(top), C.GLdouble(height), C.GLint(slices), C.GLint(stacks))
}
func Disk(q unsafe.Pointer, inner, outer float32, slices, loops int) {
C.gluDisk((*[0]byte)(q), C.GLdouble(inner), C.GLdouble(outer), C.GLint(slices), C.GLint(loops))
}
// And, of course:
func SolidTeapot(size gl.GLdouble) {
C.glutSolidTeapot(C.GLdouble(size))
}
//void glTexCoord3d (float64 s, float64 t, float64 r)
func TexCoord3d(s float64, t float64, r float64) {
C.glTexCoord3d(C.GLdouble(s), C.GLdouble(t), C.GLdouble(r))
}
// Set the normal of the plane onto which points are projected onto before tesselation.
func (tess *Tesselator) Normal(valueX, valueY, valueZ float64) {
cx := C.GLdouble(valueX)
cy := C.GLdouble(valueY)
cz := C.GLdouble(valueZ)
C.gluTessNormal(tess.tess, cx, cy, cz)
}
//void glTexCoord1d (float64 s)
func TexCoord1d(s float64) {
C.glTexCoord1d(C.GLdouble(s))
}
func WireCone(base, height gl.GLdouble, slices, stacks gl.GLint) {
C.glutWireCone(C.GLdouble(base), C.GLdouble(height), C.GLint(slices), C.GLint(stacks))
}
//void glTexCoord2d (float64 s, float64 t)
func TexCoord2d(s float64, t float64) {
C.glTexCoord2d(C.GLdouble(s), C.GLdouble(t))
}
func WireTeapot(size gl.GLdouble) {
C.glutWireTeapot(C.GLdouble(size))
}
//void glTexCoord4d (float64 s, float64 t, float64 r, float64 q)
func TexCoord4d(s float64, t float64, r float64, q float64) {
C.glTexCoord4d(C.GLdouble(s), C.GLdouble(t), C.GLdouble(r), C.GLdouble(q))
}
func Sphere(q unsafe.Pointer, radius float32, slices, stacks int) {
C.gluSphere((*[0]byte)(q), C.GLdouble(radius), C.GLint(slices), C.GLint(stacks))
}
