void gxRenderingPoint::RenderAsScreenSphere(int nRadius)
{
GLdouble modelMatrix[16];
GLdouble projMatrix[16];
GLint viewport[4];
glGetDoublev(GL_PROJECTION_MATRIX, projMatrix);
glGetDoublev(GL_MODELVIEW_MATRIX, modelMatrix);
glGetIntegerv(GL_VIEWPORT, viewport);
GLdouble winx;
GLdouble winy;
GLdouble winz;
GLdouble objx = x;
GLdouble objy = y;
GLdouble objz = z;
gluProject(objx, objy, objz, modelMatrix, projMatrix, viewport, &winx, &winy, &winz);
winx += nRadius;
gluUnProject(winx, winy, winz, modelMatrix, projMatrix, viewport, &objx, &objy, &objz);
mlVector3D vSurfacePosition(objx, objy, objz);
float fRadius = (vSurfacePosition - (*this)).Magnitude();
RenderAsSphere(fRadius);
}
void World::RenderMousePickSphere()
{
// Convert screen radius to 3D radius
mlVector3D vPoint = m_vMousePickPosition;
mlVector3D vPointBase = m_trnCameraBase.TransformPointInverse(vPoint);
bool bEq = (vPoint - vPointBase).Magnitude() < 1.0f;
int nRadius = 15;
{
GLdouble winX, winY, winZ;
GLdouble objX, objY, objZ;
objX = vPoint.x;
objY = vPoint.y;
objZ = vPoint.z;
gluProject(objX, objY, objZ, modelMatrix, projMatrix, viewport, &winX, &winY, &winZ);
winX += nRadius;
gluUnProject(winX, winY, winZ, modelMatrix, projMatrix, viewport, &objX, &objY, &objZ);
mlVector3D vSurfacePosition(objX, objY, objZ);
float fRadius = (vSurfacePosition - vPoint).Magnitude();
// Now render
glLineWidth(1.0f);
glDisable(GL_TEXTURE_2D);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glTranslatef(vPoint.x, vPoint.y, vPoint.z);
//glPushMatrix();
mlTransform transform = m_trnCameraBase;
transform.SetTranslation(mlVector3DZero);
mlMatrix4x4 mat(transform.GetMatrix());
mlFloat * pMat = reinterpret_cast<mlFloat*>(&mat);
glMultMatrixf(pMat);
glColor4ub(
0,
255,
0,
255);
//GLfloat faceColor[4] = { 0.0f, 1.0f, 0.0f, 1.0f };
//glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, faceColor);
glutWireSphere(fRadius, 15, 15);
glPopMatrix();
}
#if 0
float fTextScale = 0.1f;
float fAxisScale = 3.0f;
glDisable(GL_DEPTH_TEST);
glBegin(GL_LINES);
glColor4ub(255,0,0, 255);
glVertex3f(0,0,0);
glVertex3f(fRadius * fAxisScale, 0,0);
glColor4ub(0,0,255, 255);
glVertex3f(0,0,0);
glVertex3f(0, fRadius * fAxisScale, 0);
glColor4ub(0,255,0, 255);
glVertex3f(0,0,0);
glVertex3f(0,0, fRadius * fAxisScale);
glEnd();
// Next step: change this to use the base coordinate system instead of this hardcoded one.
{
stringstream ss;
if(bEq)
ss << std::setprecision(2) << std::fixed << "x=" << vPoint.x;
else
ss << std::setprecision(2) << std::fixed << "x=" << vPointBase.x << std::endl << " " << vPoint.x;
glColor4ub(255,0,0, 255);
glPushMatrix();
glTranslatef(fRadius * fAxisScale + fRadius * fTextScale * 0.1f, 0, 0);
glScalef(fRadius * fTextScale, fRadius * fTextScale, fRadius * fTextScale);
DrawText3DStroked(mlVector3DZero, ss.str());
glPopMatrix();
}
{
stringstream ss;
if(bEq)
ss << std::setprecision(2) << std::fixed << "y=" << vPoint.y;
else
ss << std::setprecision(2) << std::fixed << "y=" << vPointBase.y << std::endl << " " << vPoint.y;
glColor4ub(0,0,255, 255);
glPushMatrix();
glTranslatef(fRadius * fTextScale * 0.1f, fRadius * fAxisScale, 0);
glScalef(fRadius * fTextScale, fRadius * fTextScale, fRadius * fTextScale);
DrawText3DStroked(mlVector3DZero, ss.str());
glPopMatrix();
}
{
stringstream ss;
if(bEq)
ss << std::setprecision(2) << std::fixed << "z=" << vPoint.z;
else
ss << std::setprecision(2) << std::fixed << "z=" << vPointBase.z << std::endl << " " << vPoint.z;
glColor4ub(0,255,0, 255);
glPushMatrix();
glTranslatef(fRadius * fTextScale * 2.0f, 0, fRadius * fAxisScale);
glScalef(fRadius * fTextScale, fRadius * fTextScale, fRadius * fTextScale);
DrawText3DStroked(mlVector3DZero, ss.str());
glPopMatrix();
}
glPopMatrix();
{
glPushMatrix();
// Use the camera transform moved to the pick position.
mlTransform transform = m_trnCamera;
transform.SetTranslation(vPoint);
mlMatrix4x4 mat(transform.GetMatrix());
mlFloat * pMat = reinterpret_cast<mlFloat*>(&mat);
glMultMatrixf(pMat);
// Rotations required because DrawText3DStroked draws text along the Z axis
glRotatef(-90.0f, 1.0, 0.0f, 0.0f);
// Move text beneath the pick sphere
glTranslatef(0,0,fRadius * -2.0f);
// Use fRadius to scale it so it remains a constant size
glScalef(fRadius * fTextScale, fRadius * fTextScale, fRadius * fTextScale);
glColor4ub(255,255,0, 255);
stringstream ss;
if(bEq)
ss << std::setprecision(2) << std::fixed << "(" << vPoint.x << "," << vPoint.y << "," << vPoint.z << ")";
else
ss << std::setprecision(2) << std::fixed << "(" << vPointBase.x << "," << vPointBase.y << "," << vPointBase.z << ")" << std::endl
<< "(" << vPoint.x << "," << vPoint.y << "," << vPoint.z << ")";
DrawText3DStroked(mlVector3DZero, ss.str());
glPopMatrix();
}
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glColor4ub(0,255,0, 255);
//glPopMatrix();
}
