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+/*
+ * Mesa 3-D graphics library
+ * Version: 3.5
+ *
+ * The MIT License
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * Linux Magazine July 2001
+ * Conversion to UGL/Mesa from GLUT by Stephane Raimbault, 2001
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+
+#include <ugl/ugl.h>
+#include <ugl/uglevent.h>
+#include <ugl/uglinput.h>
+#include <ugl/uglucode.h>
+
+#include <GL/uglmesa.h>
+#include <GL/glu.h>
+
+/* Need GLUT_SHAPES */
+
+#include <GL/uglglutshapes.h>
+
+#ifndef PI
+#define PI 3.14159265
+#endif
+
+UGL_LOCAL UGL_EVENT_SERVICE_ID eventServiceId;
+UGL_LOCAL UGL_EVENT_Q_ID qId;
+UGL_LOCAL UGL_MESA_CONTEXT umc;
+UGL_LOCAL volatile UGL_BOOL stopWex;
+
+UGL_LOCAL GLint angle;
+UGL_LOCAL GLfloat Sin[360], Cos[360];
+UGL_LOCAL GLfloat L0pos[]={0.0, 2.0, -1.0};
+UGL_LOCAL GLfloat L0dif[]={0.3, 0.3, 0.8};
+UGL_LOCAL GLfloat L1pos[]={2.0, 2.0, 2.0};
+UGL_LOCAL GLfloat L1dif[]={0.5, 0.5, 0.5};
+UGL_LOCAL GLfloat Mspec[3];
+UGL_LOCAL GLfloat Mshiny;
+UGL_LOCAL GLuint theTeapot;
+
+UGL_LOCAL void calcTableCosSin()
+{
+ int i;
+ for(i=0;i<360;i++) {
+ Cos[i] = cos(((float)i)/180.0*PI);
+ Sin[i] = sin(((float)i)/180.0*PI);
+ }
+}
+
+UGL_LOCAL void initGL(void)
+ {
+ glClearColor(0.0, 0.0, 0.0, 0.0);
+ glColor3f(1.0, 0.0, 0.0);
+ glEnable(GL_DEPTH_TEST);
+
+ glShadeModel(GL_SMOOTH);
+ glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
+ glEnable(GL_LIGHTING);
+ glEnable(GL_LIGHT0);
+ glEnable(GL_LIGHT1);
+ glLightfv(GL_LIGHT0, GL_DIFFUSE, L0dif);
+ glLightfv(GL_LIGHT0, GL_SPECULAR, L0dif);
+ glLightfv(GL_LIGHT1, GL_DIFFUSE, L1dif);
+ glLightfv(GL_LIGHT1, GL_SPECULAR, L1dif);
+
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, Mspec);
+ glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, Mshiny);
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ gluPerspective(45.0, 1.0, 0.1, 10.0);
+ glMatrixMode(GL_MODELVIEW);
+
+ theTeapot = glGenLists(1);
+ glNewList(theTeapot, GL_COMPILE);
+ glutSolidTeapot(1.0);
+ glEndList();
+
+ }
+
+UGL_LOCAL void drawGL()
+ {
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glLoadIdentity();
+
+ gluLookAt(4.5*Cos[angle], 2.0,4.5*Sin[angle],0.0,0.0,0.0,0.0,
+ 1.0,0.0);
+ glLightfv(GL_LIGHT0, GL_POSITION, L0pos);
+ glLightfv(GL_LIGHT1, GL_POSITION, L1pos);
+
+ glCallList(theTeapot);
+
+ glFlush();
+
+ uglMesaSwapBuffers();
+ }
+
+UGL_LOCAL void echoUse(void)
+ {
+ printf("tTeapot keys:\n");
+ printf(" Left Counter clockwise rotation (y-axis)\n");
+ printf(" Right Clockwise rotation (y-axis)\n");
+ printf(" j Enable/disable Light0\n");
+ printf(" k Enable/disable Light1\n");
+ printf(" m Add specular\n");
+ printf(" l Remove specular\n");
+ printf(" o Add shininess\n");
+ printf(" p Remove shininess\n");
+ printf(" ESC Exit\n");
+ }
+
+
+UGL_LOCAL void readKey (UGL_WCHAR key)
+ {
+ switch(key)
+ {
+ case UGL_UNI_RIGHT_ARROW:
+ angle +=2;
+ if (angle>= 360)
+ angle-=360;
+ break;
+ case UGL_UNI_LEFT_ARROW:
+ angle -=2;
+ if (angle<0)
+ angle+=360;
+ break;
+ case 'j':
+ glIsEnabled(GL_LIGHT0) ?
+ glDisable(GL_LIGHT0) : glEnable(GL_LIGHT0);
+ break;
+ case 'k':
+ glIsEnabled(GL_LIGHT1) ?
+ glDisable(GL_LIGHT1) : glEnable(GL_LIGHT1);
+ break;
+ case 'm':
+ Mspec[0]+=0.1;
+ if(Mspec[0]>1)
+ Mspec[0]=1;
+ Mspec[1]+=0.1;
+ if(Mspec[1]>1)
+ Mspec[1]=1;
+ Mspec[2]+=0.1;
+ if(Mspec[2]>1)
+ Mspec[2]=1;
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, Mspec);
+ break;
+ case 'l':
+ Mspec[0]-=0.1;
+ if(Mspec[0]>1)
+ Mspec[0]=1;
+ Mspec[1]-=0.1;
+ if(Mspec[1]>1)
+ Mspec[1]=1;
+ Mspec[2]-=0.1;
+ if(Mspec[2]>1)
+ Mspec[2]=1;
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, Mspec);
+ break;
+ case 'o':
+ Mshiny -= 1;
+ if (Mshiny<0)
+ Mshiny=0;
+ glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, Mshiny);
+ break;
+ case 'p':
+ Mshiny += 1;
+ if (Mshiny>128)
+ Mshiny=128;
+ glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, Mshiny);
+ break;
+ case UGL_UNI_ESCAPE:
+ stopWex = UGL_TRUE;
+ break;
+ }
+ }
+
+UGL_LOCAL void loopEvent(void)
+ {
+ UGL_EVENT event;
+ UGL_INPUT_EVENT * pInputEvent;
+
+ UGL_FOREVER
+ {
+ if (uglEventGet (qId, &event, sizeof (event), UGL_NO_WAIT)
+ != UGL_STATUS_Q_EMPTY)
+ {
+ pInputEvent = (UGL_INPUT_EVENT *)&event;
+
+ if (pInputEvent->header.type == UGL_EVENT_TYPE_KEYBOARD &&
+ pInputEvent->modifiers & UGL_KEYBOARD_KEYDOWN)
+ readKey(pInputEvent->type.keyboard.key);
+ }
+
+ drawGL();
+ if (stopWex)
+ break;
+ }
+ }
+
+void windMLTeapot (void);
+
+void uglteapot (void)
+ {
+ taskSpawn ("tTeapot", 210, VX_FP_TASK, 100000, (FUNCPTR)windMLTeapot,
+ 0,1,2,3,4,5,6,7,8,9);
+ }
+
+void windMLTeapot (void)
+ {
+ UGL_INPUT_DEVICE_ID keyboardDevId;
+ GLsizei displayWidth, displayHeight;
+ GLsizei x, y, w, h;
+
+ angle = 45;
+ Mspec[0] = 0.5;
+ Mspec[1] = 0.5;
+ Mspec[2] = 0.5;
+ Mshiny = 50;
+
+ uglInitialize ();
+
+ uglDriverFind (UGL_KEYBOARD_TYPE, 0,
+ (UGL_UINT32 *)&keyboardDevId);
+
+ uglDriverFind (UGL_EVENT_SERVICE_TYPE, 0, (UGL_UINT32 *)&eventServiceId);
+
+ qId = uglEventQCreate (eventServiceId, 100);
+
+ /* Double buffering */
+ umc = uglMesaCreateNewContext (UGL_MESA_DOUBLE, NULL);
+ if (umc == NULL)
+ {
+ uglDeinitialize ();
+ return;
+ }
+
+ uglMesaMakeCurrentContext (umc, 0, 0, 1, 1);
+
+ uglMesaGetIntegerv(UGL_MESA_DISPLAY_WIDTH, &displayWidth);
+ uglMesaGetIntegerv(UGL_MESA_DISPLAY_HEIGHT, &displayHeight);
+
+ h = (displayHeight*2)/3;
+ w = h;
+ x = (displayWidth-w)/2;
+ y = (displayHeight-h)/2;
+
+ uglMesaMoveToWindow(x, y);
+ uglMesaResizeToWindow(w, h);
+
+ calcTableCosSin();
+
+ initGL ();
+
+ echoUse();
+
+ stopWex = UGL_FALSE;
+ loopEvent();
+
+ uglEventQDestroy (eventServiceId, qId);
+
+ uglMesaDestroyContext();
+ uglDeinitialize ();
+
+ return;
+ }
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