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#include "RNA3D_GlobalHeader.hxx"
#include "RNA3D_Global.hxx"
#include "RNA3D_OpenGLGraphics.hxx"
#include "RNA3D_Renderer.hxx"
#include "RNA3D_Textures.hxx"
#include "RNA3D_StructureData.hxx"
#include <awt_canvas.hxx>
#include <aw_window_Xm_interface.hxx>
using namespace std;
OpenGLGraphics::OpenGLGraphics()
: displayGrid(false)
, ApplicationBGColor(0, 0, 0)
{
}
OpenGLGraphics::~OpenGLGraphics() {
}
// Sets the Background Color for the OpenGL Window
void OpenGLGraphics::SetOpenGLBackGroundColor() {
unsigned long bgColor;
XtVaGetValues(RNA3D->glw, XmNbackground, &bgColor, NULL);
Widget w = AW_get_AreaWidget(RNA3D->gl_Canvas->aww, AW_MIDDLE_AREA);
XColor xcolor;
xcolor.pixel = bgColor;
Colormap colormap = DefaultColormapOfScreen(XtScreen(w));
XQueryColor(XtDisplay(w), colormap, &xcolor);
float r = xcolor.red / 65535.0;
float g = xcolor.green / 65535.0;
float b = xcolor.blue / 65535.0;
// set OpenGL background color to the widget's background
glClearColor(r, g, b, 1);
ApplicationBGColor = ColorRGBf(r, g, b);
}
// Converts the GC into RGB values
ColorRGBf OpenGLGraphics::ConvertGCtoRGB(int gc) {
ColorRGBf clr = ColorRGBf(0, 0, 0);
Widget w = AW_get_AreaWidget(RNA3D->gl_Canvas->aww, AW_MIDDLE_AREA);
GC xgc = AW_map_AreaGC(RNA3D->gl_Canvas->aww, AW_MIDDLE_AREA, gc);
XGCValues xGCValues;
XGetGCValues(XtDisplay(w), xgc, GCForeground, &xGCValues);
unsigned long color = xGCValues.foreground;
XColor xcolor;
xcolor.pixel = color;
Colormap colormap = DefaultColormapOfScreen(XtScreen(w));
XQueryColor(XtDisplay(w), colormap, &xcolor);
float r = xcolor.red / 65535.0;
float g = xcolor.green / 65535.0;
float b = xcolor.blue / 65535.0;
clr = ColorRGBf(r, g, b);
return clr;
}
// Converts the GC into RGB values and sets the glColor
void OpenGLGraphics::SetColor(int gc) {
ColorRGBf color = ConvertGCtoRGB(gc);
glColor4f(color.red, color.green, color.blue, 1);
}
// Converts the GC into RGB values and returns them
ColorRGBf OpenGLGraphics::GetColor(int gc) {
ColorRGBf color = ConvertGCtoRGB(gc);
return color;
}
void OpenGLGraphics::WinToScreenCoordinates(int x, int y, GLdouble *screenPos) {
// project window coords to gl coord
glLoadIdentity();
GLdouble modelMatrix[16];
glGetDoublev(GL_MODELVIEW_MATRIX, modelMatrix);
GLdouble projMatrix[16];
glGetDoublev(GL_PROJECTION_MATRIX, projMatrix);
GLint viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
gluUnProject(x, y, 0,
modelMatrix,
projMatrix,
viewport,
// the next 3 parameters are the pointers to the final object coordinates.(double)
&screenPos[0], &screenPos[1], &screenPos[2]
);
}
// =========== Functions related to rendering FONTS ========================//
static GLuint font_base;
void OpenGLGraphics::init_font(GLuint base, char* f)
{
Display* display;
XFontStruct* font_info;
int first;
int last;
// Need an X Display before calling any Xlib routines.
display = glXGetCurrentDisplay();
if (display == 0) {
fprintf(stderr, "XOpenDisplay() failed. Exiting.\n");
exit(EXIT_FAILURE);
}
else {
// Load the font.
font_info = XLoadQueryFont(display, f);
if (!font_info) {
fprintf(stderr, "XLoadQueryFont() failed - Exiting.\n");
exit(EXIT_FAILURE);
}
else {
// Tell GLX which font & glyphs to use.
first = font_info->min_char_or_byte2;
last = font_info->max_char_or_byte2;
glXUseXFont(font_info->fid, first, last-first+1, base+first);
}
display = 0;
}
}
void OpenGLGraphics::print_string(GLuint base, char* s)
{
if (!glIsList(font_base)) {
fprintf(stderr, "print_string(): Bad display list. - Exiting.\n");
exit(EXIT_FAILURE);
}
else if (s && strlen(s)) {
glPushAttrib(GL_LIST_BIT);
glListBase(base);
glCallLists(strlen(s), GL_UNSIGNED_BYTE, (GLubyte *)s);
glPopAttrib();
}
}
void OpenGLGraphics::InitMainFont(char* f)
{
font_base = glGenLists(256);
if (!glIsList(font_base)) {
fprintf(stderr, "InitMainFont(): Out of display lists. - Exiting.\n");
exit(EXIT_FAILURE);
}
else {
init_font(font_base, f);
}
}
void OpenGLGraphics::PrintString(float x, float y, float z, char *s, void * /* font */) {
glRasterPos3f(x, y, z);
print_string(font_base, s);
}
void OpenGLGraphics::DrawBox(float x, float y, float w, float h)
{
glBegin(GL_QUADS);
glVertex2f(x-w/2, y-h/2);
glVertex2f(x+w/2, y-h/2);
glVertex2f(x+w/2, y+h/2);
glVertex2f(x-w/2, y+h/2);
glEnd();
}
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