void
J3DSurface::PlaceVertex
(
J3DPainter& p,
const JIndex rowIndex
)
{
const JFloat vertex[3] =
{
itsVertexList->GetElement(rowIndex, 1),
itsVertexList->GetElement(rowIndex, 2),
itsVertexList->GetElement(rowIndex, 3)
};
JRGB color;
JFloat alpha = (vertex[2] - itsZMin)/(itsZMax - itsZMin);
if (alpha <= 0.5)
{
color = JBlend(itsMinColor, itsMidColor, 2.0*alpha);
}
else
{
color = JBlend(itsMidColor, itsMaxColor, 2.0*alpha - 1.0);
}
const JColorIndex colorIndex = (p.GetColormap()).GetColor(color);
p.SetVertexColor(colorIndex);
glVertex3dv(vertex);
}
void
J3DCylinder::Render
(
J3DPainter& p
)
{
p.SetVertexColor(itsColor);
gluCylinder(itsQuadric, itsBaseRadius, itsTopRadius, itsHeight,
32, // 32 faces
1); // ???
}
void
J3DTriangle::Render
(
J3DPainter& p
)
{
glBegin(GL_TRIANGLES);
for (JIndex i=0; i<3; i++)
{
p.SetVertexColor(itsVertexColor[i]);
glVertex3dv(itsVertex[i]->GetElements());
}
glEnd();
}