int __glXDisp_GetClipPlane(__GLXclientState *cl, GLbyte *pc)
{
__GLXcontext *cx;
ClientPtr client = cl->client;
int error;
GLdouble answer[4];
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
}
pc += __GLX_SINGLE_HDR_SIZE;
__glXClearErrorOccured();
glGetClipPlane(*(GLenum *)(pc + 0), answer);
if (__glXErrorOccured()) {
__GLX_BEGIN_REPLY(0);
__GLX_SEND_HEADER();
} else {
__GLX_BEGIN_REPLY(32);
__GLX_SEND_HEADER();
__GLX_SEND_DOUBLE_ARRAY(4);
}
return Success;
}
int __glXDispSwap_GetClipPlane(__GLXclientState *cl, GLbyte *pc)
{
__GLXcontext *cx;
ClientPtr client = cl->client;
int error;
GLdouble answer[4];
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_DECLARE_SWAP_ARRAY_VARIABLES;
__GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
if (!cx) {
return error;
}
pc += __GLX_SINGLE_HDR_SIZE;
__GLX_SWAP_INT(pc + 0);
__glXClearErrorOccured();
glGetClipPlane(*(GLenum *)(pc + 0), answer);
if (__glXErrorOccured()) {
__GLX_BEGIN_REPLY(0);
__GLX_SWAP_REPLY_HEADER();
__GLX_SEND_HEADER();
} else {
__GLX_SWAP_DOUBLE_ARRAY((GLbyte *)answer, 4);
__GLX_BEGIN_REPLY(32);
__GLX_SWAP_REPLY_HEADER();
__GLX_SEND_HEADER();
__GLX_SEND_DOUBLE_ARRAY(4);
}
return Success;
}
static void init_clip_test()
{
matrix4x4d m;
if (glIsEnabled(GL_CLIP_PLANE1)) {
glGetClipPlane(GL_CLIP_PLANE1, _clip[0]);
glGetClipPlane(GL_CLIP_PLANE3, _clip[1]);
glGetDoublev (GL_MODELVIEW_MATRIX, &m[0]);
_clipoffset.x = m[12];
_clipoffset.y = m[13];
_clipoffset.z = 0;
_do_clip = true;
} else {
_do_clip = false;
}
}
static std::string getClippingState() {
std::string result;
int numPlanes = glGetInteger(GL_MAX_CLIP_PLANES);
int C;
for(C = 0; C < numPlanes; C++) {
result += format("// Clip plane %d\n", C);
result += format("%s(GL_CLIP_PLANE0 + %d);\n", glIsEnabled(GL_CLIP_PLANE0 + C) ? "glEnable" : "glDisable", C);
double x[4];
glGetClipPlane(GL_CLIP_PLANE0 + C, x);
result += format("{double coefficients[]={%4.4e, %4.4e, %4.4e, %4.4e};\n glClipPlane(GL_CLIP_PLANE0 + %d, coefficients);}\n",
x[0], x[1], x[2], x[3], C);
}
return result;
}
Polyhedron<Raycaster::Scalar>* Raycaster::clipDomain(const Raycaster::PTransform& pmv,const Raycaster::PTransform& mv) const
{
/* Clip the render domain against the view frustum's front plane: */
Point fv0=pmv.inverseTransform(Point(-1,-1,-1));
Point fv1=pmv.inverseTransform(Point( 1,-1,-1));
Point fv2=pmv.inverseTransform(Point(-1, 1,-1));
Point fv3=pmv.inverseTransform(Point( 1, 1,-1));
Plane::Vector normal=Geometry::cross(fv1-fv0,fv2-fv0)
+Geometry::cross(fv3-fv1,fv0-fv1)
+Geometry::cross(fv2-fv3,fv1-fv3)
+Geometry::cross(fv0-fv2,fv3-fv2);
Scalar offset=(normal*fv0+normal*fv1+normal*fv2+normal*fv3)*Scalar(0.25)-Scalar(1.0e-3);
Polyhedron<Scalar>* clippedDomain=renderDomain.clip(Plane(normal,offset));
/* Clip the render domain against all active clipping planes: */
GLint numClipPlanes;
glGetIntegerv(GL_MAX_CLIP_PLANES,&numClipPlanes);
for(GLint i=0;i<numClipPlanes;++i)
if(glIsEnabled(GL_CLIP_PLANE0+i))
{
/* Get the clipping plane's plane equation in eye coordinates: */
GLdouble planeEq[4];
glGetClipPlane(GL_CLIP_PLANE0+i,planeEq);
/* Transform the clipping plane to model coordinates: */
Geometry::ComponentArray<Scalar,4> hn;
for(int i=0;i<3;++i)
hn[i]=Scalar(-planeEq[i]);
hn[3]=-planeEq[3];
hn=mv.getMatrix().transposeMultiply(hn);
/* Clip the domain: */
Polyhedron<Scalar>* newClippedDomain=clippedDomain->clip(Polyhedron<Scalar>::Plane(Polyhedron<Scalar>::Plane::Vector(hn.getComponents()),-hn[3]-Scalar(1.0e-4)));
delete clippedDomain;
clippedDomain=newClippedDomain;
}
return clippedDomain;
}
void PatternLayer::draw(Graphics* const TheGraphics, const Pnt2f& TopLeft, const Pnt2f& BottomRight, const Real32 Opacity) const
{
glPushAttrib(GL_ENABLE_BIT | GL_TRANSFORM_BIT);
GLdouble Plane0[4], Plane1[4], Plane2[4], Plane3[4];
glGetClipPlane(GL_CLIP_PLANE0, Plane0);
glGetClipPlane(GL_CLIP_PLANE1, Plane1);
glGetClipPlane(GL_CLIP_PLANE2, Plane2);
glGetClipPlane(GL_CLIP_PLANE3, Plane3);
glEnable(GL_CLIP_PLANE0);
glEnable(GL_CLIP_PLANE1);
glEnable(GL_CLIP_PLANE2);
glEnable(GL_CLIP_PLANE3);
// The clipping plane for the background must get set to inside the
// border of the component. It was the outside of the component,
// so it has to be reset to the stored values from above at the end.
Vec4d LeftPlaneEquation(1.0,0.0,0.0,-TopLeft.x()),
RightPlaneEquation(-1.0,0.0,0.0,BottomRight.x()),
TopPlaneEquation(0.0,1.0,0.0,-TopLeft.y()),
BottomPlaneEquation(0.0,-1.0,0.0,BottomRight.y());
glClipPlane(GL_CLIP_PLANE0,LeftPlaneEquation.getValues());
glClipPlane(GL_CLIP_PLANE1,RightPlaneEquation.getValues());
glClipPlane(GL_CLIP_PLANE2,TopPlaneEquation.getValues());
glClipPlane(GL_CLIP_PLANE3,BottomPlaneEquation.getValues());
//Activate the Texture Transformation
if(getTransformation() != NULL)
{
getTransformation()->activate(TheGraphics->getDrawEnv());
}
Vec2f BackgroundSize (BottomRight - TopLeft);
Vec2f TopLeftTexCoords(0.0f,0.0f);
Vec2f BottomRightTexCoords(1.0f,1.0f);
Real32 RepeatHorizontal;
switch(getHorizontalRepeat())
{
case PATTERN_REPEAT_ABSOLUTE:
RepeatHorizontal = getHorizontalRepeatValue();
break;
case PATTERN_REPEAT_BY_POINT:
default:
RepeatHorizontal = static_cast<Real32>(BottomRight.x() - TopLeft.x())/static_cast<Real32>(getCorrectedPatternSize().x());
break;
}
TopLeftTexCoords[0] = -getHorizontalAlignment() * (RepeatHorizontal -1.0f);
BottomRightTexCoords[0] = TopLeftTexCoords[0] + RepeatHorizontal;
Real32 RepeatVertical;
switch(getVerticalRepeat())
{
case PATTERN_REPEAT_ABSOLUTE:
RepeatVertical = getVerticalRepeatValue();
break;
case PATTERN_REPEAT_BY_POINT:
default:
RepeatVertical = static_cast<Real32>(BottomRight.y() - TopLeft.y())/static_cast<Real32>(getCorrectedPatternSize().y());
break;
}
TopLeftTexCoords[1] = -getVerticalAlignment() * (RepeatVertical - 1.0f);
BottomRightTexCoords[1] = TopLeftTexCoords[1] + RepeatVertical;
TheGraphics->drawQuad(TopLeft, Pnt2f(BottomRight.x(), TopLeft.y()),BottomRight, Pnt2f(TopLeft.x(), BottomRight.y()),
TopLeftTexCoords, Vec2f(BottomRightTexCoords.x(), TopLeftTexCoords.y()), BottomRightTexCoords, Vec2f(TopLeftTexCoords.x(), BottomRightTexCoords.y()),
getColor(), getTexture(), Opacity);
//Deactivate the Texture Transformation
if(getTransformation() != NULL)
{
getTransformation()->deactivate(TheGraphics->getDrawEnv());
}
glPopAttrib();
}
M(void, glGetClipPlane, jint plane, jobject equation) {
glGetClipPlane(plane, BUFF(GLdouble, equation));
}
