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Add WINGs tutorial
The original website is http://www.quantitativefinanceservices.com/OpenDir/WINGslib/WINGToc.html and it had the following notice at the bottom: Copyright (c) 2010 Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License". So we are fine.
This commit is contained in:
Carlos R. Mafra
committed by
Doug Torrance
Doug Torrance
parent
beb38913b4
commit
6c515667a7
283
WINGs_tutorial/glframe.c
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283
WINGs_tutorial/glframe.c
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#include <X11/keysym.h>
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#include <GL/gl.h>
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#include <GL/glx.h>
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#include <WINGs/WINGs.h>
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#include <WINGs/WINGsP.h>
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#include <stdio.h>
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#define CONTENTH 300
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#define CONTENTW 300
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#define CONTENTMARGIN 30
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struct couple{
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WMWindow *window;
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WMFrame *frame;
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} datacouple;
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float red=252.0/256, green=88.0/256, blue=16.0/256;
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float redb=252.0/256, greenb=242.0/256, blueb=80.0/256;
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int Attr[] = { GLX_RGBA,
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GLX_RED_SIZE, 8,
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GLX_GREEN_SIZE, 8,
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GLX_BLUE_SIZE, 8,
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GLX_DEPTH_SIZE, 16,
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GLX_DOUBLEBUFFER,
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None};
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Display * display;
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float alpha=0;
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void init(void)
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{
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glClearColor (256/256, 256/256, 256/256, 0.0);
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glPolygonMode(GL_FRONT, GL_FILL);
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glPolygonMode(GL_BACK, GL_FILL);
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glEnable(GL_DEPTH_TEST);
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glShadeModel(GL_SMOOTH);
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glEnable(GL_LIGHTING);
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GLfloat ambientLight[] = { 0.2f, 0.2f, 0.2f, 1.0f };
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GLfloat diffuseLight[] = { 0.8f, 0.8f, 0.8f, 1.0f };
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GLfloat specularLight[] = { 0.5f, 0.5f, 0.5f, 1.0f };
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GLfloat position[] = { 2.0f, -0.1f, 2.0f, 1.0f };
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GLfloat position2[] = { -2.0f, -0.26f, -4.0f, 1.0f };
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glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);
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glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);
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//glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight);
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glMateriali(GL_FRONT, GL_SHININESS, 98);
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glLightfv(GL_LIGHT0, GL_POSITION, position2);
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//glLightfv(GL_LIGHT1, GL_POSITION, position2);
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glEnable(GL_LIGHT0);
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//glEnable(GL_LIGHT1);
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glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
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//glColorMaterial(GL_FRONT, GL_SPECULAR);
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glEnable(GL_COLOR_MATERIAL);
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glShadeModel(GL_SMOOTH);
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glCullFace( GL_BACK );
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glEnable( GL_CULL_FACE );
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glEnable(GL_POLYGON_SMOOTH);
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/*glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA_SATURATE, GL_ONE);
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//glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glHint(GL_POLYGON_SMOOTH_HINT,GL_NICEST);*/
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}
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void normvector(float a, float aa, float aaa, float b, float bb, float bbb, float c, float cc, float ccc,float *result){
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float v1[3];float v2[3];float tmp;
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v1[0]=(b-a);v1[1]=(bb-aa);v1[2]=(bbb-aaa);
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v2[0]=(b-c);v2[1]=(bb-cc);v2[2]=(bbb-ccc);
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result[0]=(v1[1]*v2[2]-v1[2]*v2[1]);
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result[1]=(v1[2]*v2[0]-v1[0]*v2[2]);
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result[2]=(v1[0]*v2[1]-v1[1]*v2[0]);
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tmp=sqrt(result[0]*result[0]+result[1]*result[1]+result[2]*result[2]);
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result[0]/=tmp;
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result[1]/=tmp;
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result[2]/=tmp;
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}
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void redraw(XEvent * v,void *xw){
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Window win;
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float z[3];
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win = *(Window *)xw;
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glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
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glPushMatrix(); glShadeModel(GL_SMOOTH);
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glRotatef(alpha, 0, 1, 0);
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if (alpha > 360) alpha =alpha-360;
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glBegin(GL_TRIANGLES);
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glColor3f(redb,greenb,blueb);
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normvector(-0.85f, 0.0f, 0.0f,0.0f, 0.0f, 0.85f,0.0f, 0.6f, 0.0f,z);
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glNormal3fv(z);
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glVertex3f(-0.85f, 0.0f, 0.0f);
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glVertex3f(0.0f, 0.0f, 0.85f);
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glVertex3f(0.0f, 0.6f, 0.0f);
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normvector(0.0f, 0.0f,0.85f,0.85f, 0.0f, 0.0f,0.0f, 0.60f,0.0f,z);
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glNormal3fv(z);
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glVertex3f(0.0f, 0.0f, 0.85f);
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glVertex3f(0.85f, 0.0f, 0.0f);
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glVertex3f(0.0f, 0.6f, 0.0f);
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glColor3f(red,green,blue);
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normvector(0.85f, 0.0f, 0.0f,0.0f, 0.0f, -0.85f,0.0f, 0.6f, 0.0f,z);
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glNormal3fv(z);
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glVertex3f(0.85f, 0.0f, 0.0f);
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glVertex3f(0.0f, 0.0f, -0.85f);
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glVertex3f(0.0f, 0.6f, 0.0f);
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normvector(0.0f, 0.0f, -0.85f,-0.85f, 0.0f, 0.0f,0.0f, 0.6f, 0.0f,z);
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glNormal3fv(z);
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glVertex3f(0.0f, 0.0f, -0.85f);
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glVertex3f(-0.85f, 0.0f, 0.0f);
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glVertex3f(0.0f, 0.6f, 0.0f);
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glColor3f(redb,greenb,blueb);
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normvector(-0.85f, 0.0f, 0.0f,0.0f, -1.0f, 0.0f,0.0f, 0.0f, 0.85f,z);
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glNormal3fv(z);
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glVertex3f(-0.85f, 0.0f, 0.0f);
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glVertex3f(0.0f, -1.0f, 0.0f);
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glVertex3f(0.0f, 0.0f, 0.85f);
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normvector(0.0f, 0.0f, 0.85f, 0.0f, -1.0f, 0.0f,0.85f, 0.0f, 0.0f ,z);
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glNormal3fv(z);
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glVertex3f(0.0f, 0.0f, 0.85f);
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glVertex3f(0.0f, -1.0f, 0.0f);
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glVertex3f(0.85f, 0.0f, 0.0f);
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glColor3f(red,green,blue);
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normvector(0.85f, 0.0f, 0.0f,0.0f, -1.0f, 0.0f, 0.0f, 0.0,-0.85f ,z);
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glNormal3fv(z);
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glVertex3f(0.85f, 0.0f, 0.0f);
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glVertex3f(0.0f,-1.0f, 0.0f);
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glVertex3f(0.0f, 0.0f, -0.85f);
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normvector(0.0f, 0.0f, -0.85f,0.0f, -1.0f, 0.0f, -0.85f, 0.0f,0.0f ,z);
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glNormal3fv(z);
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glVertex3f(0.0f, 0.0f, -0.85f);
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glVertex3f(0.0f, -1.0f, 0.0f);
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glVertex3f(-0.85f, 0.0f, 0.0f);
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glEnd();
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glPopMatrix();
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glXSwapBuffers(display, win);
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}
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setsize(unsigned int width, unsigned int height)
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{
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glViewport(0, 0, width, height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
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glMatrixMode (GL_MODELVIEW);
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}
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void DoRotate(void *self,void *xwindow){
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XEvent event;int i=0;
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alpha+=15;
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redraw(NULL,(Window *)xwindow);
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}
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void redo(XEvent * event,void *xw){
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switch (event->type)
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{
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case Expose:
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if (event->xexpose.count!=0) break;
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redraw(event,&event->xexpose.window);
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break;
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case ConfigureNotify: setsize(event->xconfigure.width, event->xconfigure.height); // assuming there will be an expose afterwards
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break;
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}
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}
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void closeAll(WMWidget *self,void *data){
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WMDestroyWidget(self);
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exit(0);
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}
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static void resizeHandler(void *data, WMNotification *notif){
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struct couple *tmp;tmp=(struct couple *)data;
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WMSize size = WMGetViewSize(WMWidgetView(tmp->window));
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WMResizeWidget(tmp->frame, size.width -2*CONTENTMARGIN, size.height-2*CONTENTMARGIN);
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}
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void getargs(int argc, char **argv){
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if (argc>3) {
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redb=red=(float)atoi(argv[1])/256;
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greenb=green=(float)atoi(argv[2])/256;
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blueb=blue=(float)atoi(argv[3])/256;
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}
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if (argc>6){
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redb=(float)atoi(argv[4])/256;
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greenb=(float)atoi(argv[5])/256;
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blueb=(float)atoi(argv[6])/256;
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}
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}
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int main (int argc, char **argv){
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WMFrame *glframe;
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WMScreen *screen;
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WMWindow *window;
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WMButton *Button;
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/* Xlib and glX variables */
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Window win;
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XVisualInfo *xvVisualInfo;
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Colormap cmColorMap;
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XSetWindowAttributes winAttr;
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GLXContext glXContext;
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getargs(argc,argv);
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WMInitializeApplication("GLWindow", &argc, argv);
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display = XOpenDisplay("");
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screen = WMCreateScreen(display, DefaultScreen(display));
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if(!glXQueryExtension(display, NULL, NULL)){wwarning("X server does not have GLX\n"); return 0; }
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window = WMCreateWindow(screen, "Main");
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WMResizeWidget(window, CONTENTW+2*CONTENTMARGIN, CONTENTH+2*CONTENTMARGIN*CONTENTH/CONTENTW);
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WMSetWindowAspectRatio(window, CONTENTW,CONTENTH,CONTENTW,CONTENTH);
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WMSetWindowCloseAction(window, closeAll, NULL);
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WMSetWindowTitle(window,"GL Frame");
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WMRealizeWidget(window);
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datacouple.window=window;
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WMSetViewNotifySizeChanges(WMWidgetView(window), True);
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WMAddNotificationObserver(resizeHandler, &datacouple, WMViewSizeDidChangeNotification, WMWidgetView(window));
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glframe = WMCreateFrame(window);
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datacouple.frame=glframe;
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WMResizeWidget(glframe, CONTENTW, CONTENTH);
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WMMoveWidget(glframe, CONTENTMARGIN,CONTENTMARGIN);
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WMRealizeWidget(glframe);
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Button=WMCreateButton(window, WBTMomentaryPush);
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WMSetButtonAction(Button, DoRotate,&win);
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WMSetButtonText(Button,"Turn");
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WMMoveWidget(Button, CONTENTMARGIN,2);
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WMRealizeWidget(Button);
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WMMapWidget(Button);
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/* get the frame's X window value */
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win =W_VIEW_DRAWABLE(WMWidgetView(glframe));
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WMCreateEventHandler(WMWidgetView(glframe), ExposureMask|StructureNotifyMask,redo,&win);
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xvVisualInfo = glXChooseVisual(display, DefaultScreen(display), Attr);
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if(xvVisualInfo == NULL) {wwarning("No visualinfo\n");return 0;}
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cmColorMap = XCreateColormap(display,RootWindow(display, DefaultScreen(display)), xvVisualInfo->visual, AllocNone);
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winAttr.colormap = cmColorMap;
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winAttr.border_pixel = 0;
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winAttr.background_pixel = 0;
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winAttr.event_mask = ExposureMask | ButtonPressMask |StructureNotifyMask| KeyPressMask;
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XChangeWindowAttributes(display,win,CWBorderPixel | CWColormap | CWEventMask,&winAttr);
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glXContext = glXCreateContext(display, xvVisualInfo, None, True);
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if(!glXContext) {wwarning("glX cannot create rendering context\n");return 0;}
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glXMakeCurrent(display, win, glXContext);
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WMMapWidget(glframe);
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init();
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setsize(CONTENTW,CONTENTH);
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WMMapWidget(window);
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WMScreenMainLoop(screen);
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return 0;
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}
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