// Draw function
void Line::drawFunc()
{
BEGIN_DLIST
const unsigned int n = getNumberOfVertices();
const osg::Vec3* v = getVertices();
if (n >= 2) {
if (segment) {
// Draw as line segments (pairs of vertices)
glBegin(GL_LINES);
for (unsigned int i = 0; i < n; i++) {
lcVertex3v( v[i].ptr() );
}
glEnd();
}
else {
// Draw one long line
glBegin(GL_LINE_STRIP);
for (unsigned int i = 0; i < n; i++) {
lcVertex3v( v[i].ptr() );
}
glEnd();
}
}
END_DLIST
}
//------------------------------------------------------------------------------
// drawFunc()
//------------------------------------------------------------------------------
void Polygon::drawFunc()
{
BEGIN_DLIST
unsigned int nv = getNumberOfVertices();
const osg::Vec3* vertices = getVertices();
if (nv >= 2) {
// Draw with texture
unsigned int ntc = getNumberOfTextureCoords();
if (ntc > 0 && hasTexture()) {
const osg::Vec2* texCoord = getTextureCoord();
unsigned int tc = 0; // texture count
glBegin(GL_POLYGON);
for (unsigned int i = 0; i < nv; i++) {
if (tc < ntc) {
lcTexCoord2v(texCoord[tc++].ptr());
}
lcVertex3v( vertices[i].ptr() );
}
glEnd();
}
// Draw without texture
else {
// get our color gradient, because if we have one, instead of a regular color, we will
// override it here and set it on a per vertex level.
ColorGradient* colGradient = dynamic_cast<ColorGradient*>(getColor());
glBegin(GL_POLYGON);
osg::Vec3* ptr = nullptr;
for (unsigned int i = 0; i < nv; i++) {
if (colGradient != nullptr) {
Basic::Color* col = colGradient->getColorByIdx(i+1);
if (col != nullptr)
glColor4f(static_cast<GLfloat>(col->red()), static_cast<GLfloat>(col->green()),
static_cast<GLfloat>(col->blue()), static_cast<GLfloat>(col->alpha()));
}
// if we have a material name, we will set up like we have a material
if (getMaterialName() != nullptr) {
//lcVertex3v( vertices[i].ptr() );
ptr = const_cast<osg::Vec3*>(reinterpret_cast<const osg::Vec3*>(vertices[i].ptr()));
if (ptr != nullptr) {
calcNormal();
lcNormal3(norm.x(), norm.y(), -(norm.z()));
lcVertex3(ptr->x(), ptr->y(), ptr->z());
}
}
else {
lcVertex3v(vertices[i].ptr());
}
}
glEnd();
}
}
END_DLIST
}
// Draw function
void Point::drawFunc()
{
BEGIN_DLIST
const unsigned int n = getNumberOfVertices();
const osg::Vec3* v = getVertices();
glBegin(GL_POINTS);
for (unsigned int i = 0; i < n; i++) {
lcVertex3v( v[i].ptr() );
}
glEnd();
END_DLIST
}
// Draw function
void LineLoop::drawFunc()
{
BEGIN_DLIST
const unsigned int n = getNumberOfVertices();
const osg::Vec3* v = getVertices();
if (n >= 2) {
glBegin(GL_LINE_LOOP);
for (unsigned int i = 0; i < n; i++) {
lcVertex3v( v[i].ptr() );
}
glEnd();
}
END_DLIST
}
// Draw function
void Quad::drawFunc()
{
bool ok = false;
// Draw with texture
const unsigned int nv = getNumberOfVertices();
if (nv > 3) {
if (!strip) {
int rem = nv % 4;
if (rem != 0) std::cerr << "Quad::drawFunc() - Quad have to have multiple of 4 vertices, add or remove vertices!!" << std::endl;
else {
BEGIN_DLIST
glBegin(GL_QUADS);
ok = true;
}
}
else {
int rem = nv % 2;
if (rem != 0) std::cerr << "Quad::drawFunc() - quad strips have to have multiple of 2 vertices, add or remove vertices!!" << std::endl;
else {
BEGIN_DLIST
glBegin(GL_QUAD_STRIP);
ok = true;
}
}
if (ok) {
// get our regular vertices here
const osg::Vec3* v = getVertices();
const unsigned int ntc = getNumberOfTextureCoords();
// draw with texture
if (ntc > 0 && hasTexture()) {
const osg::Vec2* texCoord = getTextureCoord();
unsigned int tc = 0; // texture count
for (unsigned int i = 0; i < nv; i++) {
// add our textures coordinates
if (tc < ntc) lcTexCoord2v(texCoord[tc++].ptr());
// now our vertices
lcVertex3v( v[i].ptr() );
}
}
// draw without texture
else {
// get our color gradient and apply it (if we have one)
ColorGradient* colGradient = dynamic_cast<ColorGradient*>(getColor());
for (unsigned int i = 0; i < nv; i++) {
if (colGradient != nullptr) {
Basic::Color* col = colGradient->getColorByIdx(i+1);
if (col != nullptr)
glColor4f(static_cast<GLfloat>(col->red()),
static_cast<GLfloat>(col->green()),
static_cast<GLfloat>(col->blue()),
static_cast<GLfloat>(col->alpha()));
}
// now add our vertex
lcVertex3v( v[i].ptr() );
}
}
glEnd();
END_DLIST
}
}
else std::cerr << "Quad::drawFunc() - Quad or QuadStrip needs at least 4 vertices!" << std::endl;
