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Draw.cpp 12.11 KiB
/* $Id: Draw.cpp,v 1.8 2000-12-05 16:59:11 remacle Exp $ */
#include "Gmsh.h"
#include "GmshUI.h"
#include "Geo.h"
#include "Mesh.h"
#include "Draw.h"
#include "Context.h"
#include "MinMax.h"
#include "CbGeneral.h"
#ifdef _UNIX
#include "Widgets.h"
#include "XContext.h"
extern XContext_T XCTX ;
extern Widgets_T WID ;
#endif
extern Context_T CTX ;
extern Mesh M;
extern List_T *Post_ViewList;
/* ------------------------------------------------------------------------ */
/* d r a w */
/* ------------------------------------------------------------------------ */
void Draw3d(void){
if(CTX.alpha){
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glEnable(GL_ALPHA);
}
else{
glDisable(GL_BLEND);
glDisable(GL_ALPHA);
}
glPolygonOffset(1.0, 1);
if(CTX.clip[0]) glEnable(GL_CLIP_PLANE0);
if(CTX.clip[1]) glEnable(GL_CLIP_PLANE1);
if(CTX.clip[2]) glEnable(GL_CLIP_PLANE2);
if(CTX.clip[3]) glEnable(GL_CLIP_PLANE3);
if(CTX.clip[4]) glEnable(GL_CLIP_PLANE4);
if(CTX.clip[5]) glEnable(GL_CLIP_PLANE5);
/* This is sufficient, since we NEVER give different normals to nodes of one polygon */
glShadeModel(GL_FLAT); //glShadeModel(GL_SMOOTH);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
/* glEnable(GL_CULL_FACE); */
glPushMatrix();
Draw_Mesh(&M);
glPopMatrix();
}
void Draw2d(void){
glEnable(GL_CLIP_PLANE0);
glEnable(GL_CLIP_PLANE1);
glEnable(GL_CLIP_PLANE2);
glEnable(GL_CLIP_PLANE3);
glEnable(GL_CLIP_PLANE4);
glEnable(GL_CLIP_PLANE5);
glDisable(GL_DEPTH_TEST);
glDisable(GL_LIGHTING);
glShadeModel(GL_FLAT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
/* to draw directly in screen coords */
glOrtho((double)CTX.viewport[0],
(double)CTX.viewport[2],
(double)CTX.viewport[1],
(double)CTX.viewport[3],-1.,1.);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glPushMatrix();
if(CTX.post.scales) Draw_Scales();
if(CTX.small_axes) Draw_SmallAxes();
glPopMatrix();
}
#ifdef _UNIX
void Draw(void){
glClearColor(UNPACK_RED(CTX.color.bg)/255.,
UNPACK_GREEN(CTX.color.bg)/255.,
UNPACK_BLUE(CTX.color.bg)/255.,
0.);
glClear(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT);
if(CTX.db) glDrawBuffer(GL_BACK);
Draw3d();
Draw2d();
glFlush();
if(CTX.db) glXSwapBuffers(XCTX.display,XtWindow(WID.G.glw));
}
#else
void Draw(void){
if(CTX.db) glDrawBuffer(GL_BACK);
glClearColor(UNPACK_RED(CTX.color.bg)/255.,
UNPACK_GREEN(CTX.color.bg)/255.,
UNPACK_BLUE(CTX.color.bg)/255.,
0.);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
Draw3d();
Draw2d();
glFlush();
if(CTX.db) MySwapBuffers();
if(CTX.db) glDrawBuffer(GL_FRONT);
}
#endif
/* ------------------------------------------------------------------------ */
/* o r t h o */
/* ------------------------------------------------------------------------ */
void Orthogonalize(int x, int y){
double Va,Wa;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if(CTX.render_mode == GMSH_SELECT)
gluPickMatrix ((GLdouble)x,
(GLdouble)(CTX.viewport[3]-y),
5.0,
5.0,
CTX.viewport);
Va = (GLdouble)(CTX.viewport[3]-CTX.viewport[1]) /
(GLdouble)(CTX.viewport[2]-CTX.viewport[0]) ;
Wa = (CTX.max[1]-CTX.min[1]) / (CTX.max[0]-CTX.min[0]);
if(Va>Wa){
CTX.vxmin = CTX.min[0];
CTX.vxmax = CTX.max[0]; CTX.vymin = 0.5*(CTX.min[1]+CTX.max[1]-Va*(CTX.max[0]-CTX.min[0]));
CTX.vymax = 0.5*(CTX.min[1]+CTX.max[1]+Va*(CTX.max[0]-CTX.min[0]));
}
else{
CTX.vxmin = 0.5*(CTX.min[0]+CTX.max[0]-(CTX.max[1]-CTX.min[1])/Va);
CTX.vxmax = 0.5*(CTX.min[0]+CTX.max[0]+(CTX.max[1]-CTX.min[1])/Va);
CTX.vymin = CTX.min[1];
CTX.vymax = CTX.max[1];
}
CTX.vxmin -= (CTX.vxmax-CTX.vxmin)/3.; CTX.vxmax += 0.25*(CTX.vxmax-CTX.vxmin);
CTX.vymin -= (CTX.vymax-CTX.vymin)/3.; CTX.vymax += 0.25*(CTX.vymax-CTX.vymin);
CTX.pixel_equiv_x = (CTX.vxmax-CTX.vxmin)/(CTX.viewport[2]-CTX.viewport[0]);
CTX.pixel_equiv_y = (CTX.vymax-CTX.vymin)/(CTX.viewport[3]-CTX.viewport[1]);
if(CTX.ortho) {
glOrtho(CTX.vxmin,CTX.vxmax,CTX.vymin,CTX.vymax,0,100*CTX.lc);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslated(0.0, 0.0, -50*CTX.lc);
}
else{
glFrustum(CTX.vxmin,CTX.vxmax,CTX.vymin,CTX.vymax,CTX.lc,100*CTX.lc);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslated(0.0, 0.0, -10*CTX.lc);
glScaled(10.,10.,10.);
}
}
/* ------------------------------------------------------------------------ */
/* i n i t */
/* ------------------------------------------------------------------------ */
void Init(void){
/*
Attention:
X11 interdit de changer le contexte (GLX) en mode GL_FEEDBACK ou GL_SELECT,
ce qui serait le cas pour les sorties postscript...
*/
#ifdef _UNIX
if(CTX.stream == TO_SCREEN)
glXMakeCurrent(XtDisplay(WID.G.glw), XtWindow(WID.G.glw), XCTX.glw.context);
#endif
Orthogonalize(0,0);
}
void InitOv(void){
#ifdef _UNIX
glXMakeCurrent(XtDisplay(WID.G.glo), XtWindow(WID.G.glo), XCTX.glo.context);
#endif
Orthogonalize(0,0);
}
void InitShading(void){
GLfloat specular[4];
int i;
glEnable(GL_LIGHTING);
glEnable(GL_NORMALIZE);
for(i = 0 ; i < 6 ; i++){
if(CTX.light[i]){
glLightfv(GL_LIGHT0 + i, GL_POSITION, CTX.light_position[i]);
glEnable(GL_LIGHT0 + i );
}
}
/* simple color commands will automatically create appropriate materials */
glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
glEnable(GL_COLOR_MATERIAL);
/* let's add some shininess to all these automatically created materials */
glMaterialf(GL_FRONT, GL_SHININESS, 40.);
specular[0] = CTX.shine;
specular[1] = CTX.shine;
specular[2] = CTX.shine;
specular[3] = 1.0;
glMaterialfv(GL_FRONT, GL_SPECULAR, specular);
}
void InitNoShading(void){
glDisable(GL_LIGHTING);
}
void InitPosition(void){
glScaled (CTX.s[0], CTX.s[1], CTX.s[2]);
glTranslated(CTX.t[0], CTX.t[1], CTX.t[2]);
if(CTX.useTrackball)
{
float m[4][4];
CTX.buildRotmatrix(m);
glMultMatrixf(&(m[0][0]));
}
else
{
glRotated (CTX.r[0], 1., 0., 0.);
glRotated (CTX.r[1], 0., 1., 0.);
glRotated (CTX.r[2], 0., 0., 1.);
}
}
/* ------------------------------------------------------------------------ */
/* r e p l o t */
/* ------------------------------------------------------------------------ */
/* n'est plus utilise que dans les cas ou des points peuvent etre
ajoutes dans la base de donnee -> dans cb_geom */
void Replot(void){
CalculateMinMax(M.Points);
Init();
Draw();
}
/* ------------------------------------------------------------------------ */
/* e n t i t y s e l e c t i o n */
/* ------------------------------------------------------------------------ */
void Process_SelectionBuffer(int x, int y, int *n, GLuint *ii, GLuint *jj){
GLuint selectBuf[SELECTION_BUFFER_SIZE];
GLint i,j,hits,names,*ptr;
glSelectBuffer(SELECTION_BUFFER_SIZE, selectBuf);
glRenderMode(GL_SELECT);
CTX.render_mode = GMSH_SELECT;
glInitNames();
glPushName(0);
glPushMatrix();
Orthogonalize(x,y);
Draw_Mesh(&M);
glPopMatrix ();
hits = glRenderMode(GL_RENDER); CTX.render_mode = GMSH_RENDER ;
if(hits<0) return; /* Selection Buffer Overflow */
ptr = (GLint*)selectBuf;
for(i=0; i<hits; i++){
names = *ptr;
ptr++; ptr++; ptr++;
for(j=0; j<names; j++){
if (j==0) ii[i] = *ptr;
else if (j==1) jj[i] = *ptr;
ptr++;
}
}
*n = hits;
}
void Filter_SelectionBuffer(int n, GLuint *typ, GLuint *ient, Vertex **thev,
Curve **thec, Surface **thes, Mesh *m){
Vertex *v=NULL, V;
Curve *c=NULL, C;
Surface *s=NULL, S;
int i;
GLuint typmin;
typmin = 4;
for(i=0;i<n;i++){
if(typ[i]<typmin) typmin = typ[i];
}
for(i=0;i<n;i++){
if(typ[i] == typmin){
switch(typ[i]){
case 0:
v = &V;
v->Num = ient[i];
if(Tree_Query(m->Points,&v)) *thev = v;
break;
case 1:
c = &C;
c->Num = ient[i];
if(Tree_Query(m->Curves,&c)) *thec = c;
break;
case 2:
s = &S;
s->Num = ient[i];
if(Tree_Query(m->Surfaces,&s)) *thes = s;
break;
}
}
}
}
#ifdef _UNIX
int check_type(int type, Vertex *v, Curve *c, Surface *s){
return ( (type==ENT_POINT && v) ||
(type==ENT_LINE && c) ||
(type==ENT_SURFACE && s) ) ;
}
int SelectEntity(int type, Vertex **v, Curve **c, Surface **s){
XEvent event;
XComposeStatus stat;
KeySym keysym;
int hits; GLuint ii[SELECTION_BUFFER_SIZE],jj[SELECTION_BUFFER_SIZE];
char buf[100];
*v = NULL;
*c = NULL;
*s = NULL;
while(1){
XtAppNextEvent(XCTX.AppContext,&event);
XtDispatchEvent(&event);
switch(event.type){
case KeyPress :
XLookupString(&event.xkey, buf, sizeof(buf), &keysym, &stat);
if(keysym == XK_q) return(0);
if(keysym == XK_e) return(-1);
break;
case ButtonPress :
Process_SelectionBuffer(event.xbutton.x, event.xbutton.y, &hits, ii, jj);
Filter_SelectionBuffer(hits,ii,jj,v,c,s,&M);
if(check_type(type,*v,*c,*s)){
BeginHighlight();
HighlightEntity(*v,*c,*s,1);
EndHighlight(1);
return(event.xbutton.button);
}
}
}
}
#else
int SelectEntity(int x, int y, Vertex **v, Curve **c, Surface **s){
int hits,i,j;
GLuint ii[SELECTION_BUFFER_SIZE],jj[SELECTION_BUFFER_SIZE];
Process_SelectionBuffer(x, y, &hits, ii, jj);
*v = NULL;
*s = NULL;
*c = NULL;
Filter_SelectionBuffer(hits,ii,jj,v,c,s,&M);
BeginHighlight();
HighlightEntity(*v,*c,*s,1);
EndHighlight(1);
return(1);
}
#endif
/* ------------------------------------------------------------------------ */
/* z o o m */
/* ------------------------------------------------------------------------ */
void myZoom(GLdouble X1, GLdouble X2, GLdouble Y1, GLdouble Y2,
GLdouble Xc1, GLdouble Xc2, GLdouble Yc1, GLdouble Yc2){
GLdouble xscale1, yscale1;
xscale1 = CTX.s[0];
yscale1 = CTX.s[1];
set_s(0, CTX.s[0] * (CTX.vxmax-CTX.vxmin)/(X2-X1));
set_s(1, CTX.s[1] * (CTX.vymax-CTX.vymin)/(Y1-Y2));
/* bif bif bif */
set_s(2, 0.5*(CTX.s[0]+CTX.s[1]));
set_t(0, CTX.t[0] * (xscale1/CTX.s[0]) - ((Xc1+Xc2)/2.)*(1.-(xscale1/CTX.s[0])));
set_t(1, CTX.t[1] * (yscale1/CTX.s[1]) - ((Yc1+Yc2)/2.)*(1.-(yscale1/CTX.s[1])));
Init();
Draw();
}
/* ------------------------------------------------------------------------ */
/* InitCb, ResizeCb, ExposeCb */
/* ------------------------------------------------------------------------ */
#ifdef _UNIX
void InitCb(Widget w, XtPointer client_data, GLwDrawingAreaCallbackStruct *cb){
glXMakeCurrent(XtDisplay(WID.G.glw), XtWindow(WID.G.glw), XCTX.glw.context);
CTX.viewport[0] = 0 ;
CTX.viewport[1] = 0 ;
CTX.viewport[2] = cb->width ;
CTX.viewport[3] = cb->height ;
glViewport(CTX.viewport[0],
CTX.viewport[1],
CTX.viewport[2],
CTX.viewport[3]);
}
void ResizeCb(Widget w,XtPointer client_data, GLwDrawingAreaCallbackStruct *cb){
CTX.viewport[0] = 0 ;
CTX.viewport[1] = 0 ;
CTX.viewport[2] = cb->width ;
CTX.viewport[3] = cb->height ;
glViewport(CTX.viewport[0],
CTX.viewport[1],
CTX.viewport[2],
CTX.viewport[3]);
Init();
Draw();
if(CTX.overlay) InitOv();
}
void ExposeCb(Widget w,XtPointer client_data, GLwDrawingAreaCallbackStruct *cb){
/* compress incoming events as much as possible */
if(cb->event->xexpose.count != 0){
return;
}
if(!CTX.expose) return;
Init();
Draw();
}
#endif