| /* |
| (c) Copyright 2001 convergence integrated media GmbH. |
| All rights reserved. |
| |
| Written by Denis Oliver Kropp <dok@convergence.de> and |
| Andreas Hundt <andi@convergence.de>. |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the |
| Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. |
| */ |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <math.h> |
| |
| #include <directfb.h> |
| #include <directfbgl.h> |
| |
| #include <GL/gl.h> |
| |
| |
| /* the super interface */ |
| IDirectFB *dfb; |
| |
| /* the primary surface (surface of primary layer) */ |
| IDirectFBSurface *primary; |
| |
| /* the GL context */ |
| IDirectFBGL *primary_gl; |
| |
| /* our font */ |
| IDirectFBFont *font; |
| |
| /* event buffer */ |
| IDirectFBEventBuffer *events; |
| |
| /* macro for a safe call to DirectFB functions */ |
| #define DFBCHECK(x...) \ |
| { \ |
| err = x; \ |
| if (err != DFB_OK) { \ |
| fprintf( stderr, "%s <%d>:\n\t", __FILE__, __LINE__ ); \ |
| DirectFBErrorFatal( #x, err ); \ |
| } \ |
| } |
| |
| static int screen_width, screen_height; |
| |
| static unsigned long T0 = 0; |
| static GLint Frames = 0; |
| static GLfloat fps = 0; |
| |
| static inline unsigned long get_millis() |
| { |
| struct timeval tv; |
| |
| gettimeofday (&tv, NULL); |
| return (tv.tv_sec * 1000 + tv.tv_usec / 1000); |
| } |
| |
| |
| #ifndef M_PI |
| #define M_PI 3.14159265 |
| #endif |
| |
| /** |
| |
| Draw a gear wheel. You'll probably want to call this function when |
| building a display list since we do a lot of trig here. |
| |
| Input: inner_radius - radius of hole at center |
| outer_radius - radius at center of teeth |
| width - width of gear |
| teeth - number of teeth |
| tooth_depth - depth of tooth |
| |
| **/ |
| |
| static void |
| gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width, |
| GLint teeth, GLfloat tooth_depth) |
| { |
| GLint i; |
| GLfloat r0, r1, r2; |
| GLfloat angle, da; |
| GLfloat u, v, len; |
| |
| r0 = inner_radius; |
| r1 = outer_radius - tooth_depth / 2.0; |
| r2 = outer_radius + tooth_depth / 2.0; |
| |
| da = 2.0 * M_PI / teeth / 4.0; |
| |
| glShadeModel(GL_FLAT); |
| |
| glNormal3f(0.0, 0.0, 1.0); |
| |
| /* draw front face */ |
| glBegin(GL_QUAD_STRIP); |
| for (i = 0; i <= teeth; i++) { |
| angle = i * 2.0 * M_PI / teeth; |
| glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5); |
| glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5); |
| if (i < teeth) { |
| glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5); |
| glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5); |
| } |
| } |
| glEnd(); |
| |
| /* draw front sides of teeth */ |
| glBegin(GL_QUADS); |
| da = 2.0 * M_PI / teeth / 4.0; |
| for (i = 0; i < teeth; i++) { |
| angle = i * 2.0 * M_PI / teeth; |
| |
| glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5); |
| glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5); |
| glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5); |
| glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5); |
| } |
| glEnd(); |
| |
| glNormal3f(0.0, 0.0, -1.0); |
| |
| /* draw back face */ |
| glBegin(GL_QUAD_STRIP); |
| for (i = 0; i <= teeth; i++) { |
| angle = i * 2.0 * M_PI / teeth; |
| glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5); |
| glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5); |
| if (i < teeth) { |
| glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5); |
| glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5); |
| } |
| } |
| glEnd(); |
| |
| /* draw back sides of teeth */ |
| glBegin(GL_QUADS); |
| da = 2.0 * M_PI / teeth / 4.0; |
| for (i = 0; i < teeth; i++) { |
| angle = i * 2.0 * M_PI / teeth; |
| |
| glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5); |
| glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5); |
| glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5); |
| glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5); |
| } |
| glEnd(); |
| |
| /* draw outward faces of teeth */ |
| glBegin(GL_QUAD_STRIP); |
| for (i = 0; i < teeth; i++) { |
| angle = i * 2.0 * M_PI / teeth; |
| |
| glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5); |
| glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5); |
| u = r2 * cos(angle + da) - r1 * cos(angle); |
| v = r2 * sin(angle + da) - r1 * sin(angle); |
| len = sqrt(u * u + v * v); |
| u /= len; |
| v /= len; |
| glNormal3f(v, -u, 0.0); |
| glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5); |
| glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5); |
| glNormal3f(cos(angle), sin(angle), 0.0); |
| glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5); |
| glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5); |
| u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da); |
| v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da); |
| glNormal3f(v, -u, 0.0); |
| glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5); |
| glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5); |
| glNormal3f(cos(angle), sin(angle), 0.0); |
| } |
| |
| glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5); |
| glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5); |
| |
| glEnd(); |
| |
| glShadeModel(GL_SMOOTH); |
| |
| /* draw inside radius cylinder */ |
| glBegin(GL_QUAD_STRIP); |
| for (i = 0; i <= teeth; i++) { |
| angle = i * 2.0 * M_PI / teeth; |
| glNormal3f(-cos(angle), -sin(angle), 0.0); |
| glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5); |
| glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5); |
| } |
| glEnd(); |
| |
| } |
| |
| static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0; |
| static GLfloat inc_rotx = 0, inc_roty = 0, inc_rotz = 0; |
| static GLint gear1, gear2, gear3; |
| static GLfloat angle = 0.0; |
| |
| static void |
| draw(void) |
| { |
| glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| |
| glPushMatrix(); |
| glRotatef(view_rotx, 1.0, 0.0, 0.0); |
| glRotatef(view_roty, 0.0, 1.0, 0.0); |
| glRotatef(view_rotz, 0.0, 0.0, 1.0); |
| |
| glPushMatrix(); |
| glTranslatef(-3.0, -2.0, 0.0); |
| glRotatef(angle, 0.0, 0.0, 1.0); |
| glCallList(gear1); |
| glPopMatrix(); |
| |
| glPushMatrix(); |
| glTranslatef(3.1, -2.0, 0.0); |
| glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0); |
| glCallList(gear2); |
| glPopMatrix(); |
| |
| glPushMatrix(); |
| glTranslatef(-3.1, 4.2, 0.0); |
| glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0); |
| glCallList(gear3); |
| glPopMatrix(); |
| |
| glPopMatrix(); |
| } |
| |
| /* new window size or exposure */ |
| static void |
| reshape(int width, int height) |
| { |
| GLfloat h = (GLfloat) height / (GLfloat) width; |
| |
| glViewport(0, 0, (GLint) width, (GLint) height); |
| glMatrixMode(GL_PROJECTION); |
| glLoadIdentity(); |
| glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0); |
| glMatrixMode(GL_MODELVIEW); |
| glLoadIdentity(); |
| glTranslatef(0.0, 0.0, -40.0); |
| } |
| |
| static void |
| init(int argc, char *argv[]) |
| { |
| static GLfloat pos[4] = {5.0, 5.0, 10.0, 0.0}; |
| static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0}; |
| static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0}; |
| static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0}; |
| GLint i; |
| |
| glLightfv(GL_LIGHT0, GL_POSITION, pos); |
| glEnable(GL_CULL_FACE); |
| glEnable(GL_LIGHTING); |
| glEnable(GL_LIGHT0); |
| glEnable(GL_DEPTH_TEST); |
| |
| /* make the gears */ |
| gear1 = glGenLists(1); |
| glNewList(gear1, GL_COMPILE); |
| glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red); |
| gear(1.0, 4.0, 1.0, 20, 0.7); |
| glEndList(); |
| |
| gear2 = glGenLists(1); |
| glNewList(gear2, GL_COMPILE); |
| glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green); |
| gear(0.5, 2.0, 2.0, 10, 0.7); |
| glEndList(); |
| |
| gear3 = glGenLists(1); |
| glNewList(gear3, GL_COMPILE); |
| glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue); |
| gear(1.3, 2.0, 0.5, 10, 0.7); |
| glEndList(); |
| |
| glEnable(GL_NORMALIZE); |
| |
| for ( i=1; i<argc; i++ ) { |
| if (strcmp(argv[i], "-info")==0) { |
| printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); |
| printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); |
| printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); |
| printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS)); |
| } |
| } |
| } |
| |
| int main( int argc, char *argv[] ) |
| { |
| int quit = 0; |
| DFBResult err; |
| DFBSurfaceDescription dsc; |
| |
| DFBCHECK(DirectFBInit( &argc, &argv )); |
| |
| /* create the super interface */ |
| DFBCHECK(DirectFBCreate( &dfb )); |
| |
| /* create an event buffer for all devices with these caps */ |
| DFBCHECK(dfb->CreateInputEventBuffer( dfb, DICAPS_KEYS | DICAPS_AXES, |
| DFB_FALSE, &events )); |
| |
| /* set our cooperative level to DFSCL_FULLSCREEN |
| for exclusive access to the primary layer */ |
| dfb->SetCooperativeLevel( dfb, DFSCL_FULLSCREEN ); |
| |
| /* get the primary surface, i.e. the surface of the |
| primary layer we have exclusive access to */ |
| dsc.flags = DSDESC_CAPS; |
| dsc.caps = DSCAPS_PRIMARY | DSCAPS_DOUBLE; |
| |
| DFBCHECK(dfb->CreateSurface( dfb, &dsc, &primary )); |
| |
| /* get the size of the surface and fill it */ |
| DFBCHECK(primary->GetSize( primary, &screen_width, &screen_height )); |
| DFBCHECK(primary->FillRectangle( primary, 0, 0, |
| screen_width, screen_height )); |
| primary->Flip( primary, NULL, 0 ); |
| |
| /* create the default font and set it */ |
| DFBCHECK(dfb->CreateFont( dfb, NULL, NULL, &font )); |
| DFBCHECK(primary->SetFont( primary, font )); |
| |
| /* get the GL context */ |
| DFBCHECK(primary->GetGL( primary, &primary_gl )); |
| |
| DFBCHECK(primary_gl->Lock( primary_gl )); |
| |
| init(argc, argv); |
| reshape(screen_width, screen_height); |
| |
| DFBCHECK(primary_gl->Unlock( primary_gl )); |
| |
| T0 = get_millis(); |
| |
| while (!quit) { |
| DFBInputEvent evt; |
| unsigned long t; |
| |
| DFBCHECK(primary_gl->Lock( primary_gl )); |
| |
| draw(); |
| |
| DFBCHECK(primary_gl->Unlock( primary_gl )); |
| |
| if (fps) { |
| char buf[64]; |
| |
| snprintf(buf, 64, "%4.1f FPS\n", fps); |
| |
| primary->SetColor( primary, 0xff, 0, 0, 0xff ); |
| primary->DrawString( primary, buf, -1, screen_width - 5, 5, DSTF_TOPRIGHT ); |
| } |
| |
| primary->Flip( primary, NULL, 0 ); |
| Frames++; |
| |
| |
| t = get_millis(); |
| if (t - T0 >= 2000) { |
| GLfloat seconds = (t - T0) / 1000.0; |
| |
| fps = Frames / seconds; |
| |
| T0 = t; |
| Frames = 0; |
| } |
| |
| |
| while (events->GetEvent( events, DFB_EVENT(&evt) ) == DFB_OK) { |
| switch (evt.type) { |
| case DIET_KEYPRESS: |
| switch (evt.key_symbol) { |
| case DIKS_ESCAPE: |
| quit = 1; |
| break; |
| case DIKS_CURSOR_UP: |
| inc_rotx = 5.0; |
| break; |
| case DIKS_CURSOR_DOWN: |
| inc_rotx = -5.0; |
| break; |
| case DIKS_CURSOR_LEFT: |
| inc_roty = 5.0; |
| break; |
| case DIKS_CURSOR_RIGHT: |
| inc_roty = -5.0; |
| break; |
| case DIKS_PAGE_UP: |
| inc_rotz = 5.0; |
| break; |
| case DIKS_PAGE_DOWN: |
| inc_rotz = -5.0; |
| break; |
| default: |
| ; |
| } |
| break; |
| case DIET_KEYRELEASE: |
| switch (evt.key_symbol) { |
| case DIKS_CURSOR_UP: |
| inc_rotx = 0; |
| break; |
| case DIKS_CURSOR_DOWN: |
| inc_rotx = 0; |
| break; |
| case DIKS_CURSOR_LEFT: |
| inc_roty = 0; |
| break; |
| case DIKS_CURSOR_RIGHT: |
| inc_roty = 0; |
| break; |
| case DIKS_PAGE_UP: |
| inc_rotz = 0; |
| break; |
| case DIKS_PAGE_DOWN: |
| inc_rotz = 0; |
| break; |
| default: |
| ; |
| } |
| break; |
| case DIET_AXISMOTION: |
| if (evt.flags & DIEF_AXISREL) { |
| switch (evt.axis) { |
| case DIAI_X: |
| view_roty += evt.axisrel / 2.0; |
| break; |
| case DIAI_Y: |
| view_rotx += evt.axisrel / 2.0; |
| break; |
| case DIAI_Z: |
| view_rotz += evt.axisrel / 2.0; |
| break; |
| default: |
| ; |
| } |
| } |
| break; |
| default: |
| ; |
| } |
| } |
| |
| angle += 2.0; |
| |
| view_rotx += inc_rotx; |
| view_roty += inc_roty; |
| view_rotz += inc_rotz; |
| } |
| |
| /* release our interfaces to shutdown DirectFB */ |
| primary_gl->Release( primary_gl ); |
| primary->Release( primary ); |
| font->Release( font ); |
| events->Release( events ); |
| dfb->Release( dfb ); |
| |
| return 0; |
| } |
| |