GHOST_C-Test.c

Go to the documentation of this file.

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>

#define FALSE 0

#include "GHOST_C-api.h"

#if defined(WIN32) || defined(__APPLE__)
    #ifdef WIN32
        #include <windows.h>
        #include <GL/gl.h>
    #else /* WIN32 */
        /* __APPLE__ is defined */
        #include <AGL/gl.h>
    #endif /* WIN32 */
#else /* defined(WIN32) || defined(__APPLE__) */
    #include <GL/gl.h>
#endif /* defined(WIN32) || defined(__APPLE__) */


static void gearsTimerProc(GHOST_TimerTaskHandle task, GHOST_TUns64 time);
int processEvent(GHOST_EventHandle hEvent, GHOST_TUserDataPtr userData);

static GLfloat view_rotx=20.0, view_roty=30.0, view_rotz=0.0;
static GLfloat fAngle = 0.0;
static int sExitRequested = 0;
static GHOST_SystemHandle shSystem = NULL;
static GHOST_WindowHandle sMainWindow = NULL;
static GHOST_WindowHandle sSecondaryWindow = NULL;
static GHOST_TStandardCursor sCursor = GHOST_kStandardCursorFirstCursor;
static GHOST_WindowHandle sFullScreenWindow = NULL;
static GHOST_TimerTaskHandle sTestTimer;
static GHOST_TimerTaskHandle sGearsTimer;

static void testTimerProc(GHOST_TimerTaskHandle task, GHOST_TUns64 time)
{
    printf("timer1, time=%d\n", (int)time);
}


static void gearGL(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;
    const double pi = 3.14159264;
    
    r0 = inner_radius;
    r1 = (float)(outer_radius - tooth_depth/2.0);
    r2 = (float)(outer_radius + tooth_depth/2.0);
    
    da = (float)(2.0*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 = (float)(i * 2.0*pi / teeth);
        glVertex3f((float)(r0*cos(angle)), (float)(r0*sin(angle)), (float)(width*0.5));
        glVertex3f((float)(r1*cos(angle)), (float)(r1*sin(angle)), (float)(width*0.5));
        glVertex3f((float)(r0*cos(angle)), (float)(r0*sin(angle)), (float)(width*0.5));
        glVertex3f((float)(r1*cos(angle+3*da)), (float)(r1*sin(angle+3*da)), (float)(width*0.5));
    }
    glEnd();
    
    /* draw front sides of teeth */
    glBegin(GL_QUADS);
    da = (float)(2.0*pi / teeth / 4.0);
    for (i=0;i<teeth;i++) {
        angle = (float)(i * 2.0*pi / teeth);
        glVertex3f((float)(r1*cos(angle)), (float)(r1*sin(angle)), (float)(width*0.5));
        glVertex3f((float)(r2*cos(angle+da)), (float)(r2*sin(angle+da)), (float)(width*0.5));
        glVertex3f((float)(r2*cos(angle+2*da)), (float)(r2*sin(angle+2*da)), (float)(width*0.5));
        glVertex3f((float)(r1*cos(angle+3*da)), (float)(r1*sin(angle+3*da)), (float)(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 = (float)(i * 2.0*pi / teeth);
        glVertex3f((float)(r1*cos(angle)), (float)(r1*sin(angle)), (float)(-width*0.5));
        glVertex3f((float)(r0*cos(angle)), (float)(r0*sin(angle)), (float)(-width*0.5));
        glVertex3f((float)(r1*cos(angle+3*da)), (float)(r1*sin(angle+3*da)), (float)(-width*0.5));
        glVertex3f((float)(r0*cos(angle)), (float)(r0*sin(angle)), (float)(-width*0.5));
    }
    glEnd();
    
    /* draw back sides of teeth */
    glBegin(GL_QUADS);
    da = (float)(2.0*pi / teeth / 4.0);
    for (i=0;i<teeth;i++) {
        angle = (float)(i * 2.0*pi / teeth);
        glVertex3f((float)(r1*cos(angle+3*da)), (float)(r1*sin(angle+3*da)), (float)(-width*0.5));
        glVertex3f((float)(r2*cos(angle+2*da)), (float)(r2*sin(angle+2*da)), (float)(-width*0.5));
        glVertex3f((float)(r2*cos(angle+da)), (float)(r2*sin(angle+da)), (float)(-width*0.5));
        glVertex3f((float)(r1*cos(angle)), (float)(r1*sin(angle)), (float)(-width*0.5));
    }
    glEnd();
    
    /* draw outward faces of teeth */
    glBegin(GL_QUAD_STRIP);
    for (i=0;i<teeth;i++) {
        angle = (float)(i * 2.0*pi / teeth);
        glVertex3f((float)(r1*cos(angle)), (float)(r1*sin(angle)), (float)(width*0.5));
        glVertex3f((float)(r1*cos(angle)), (float)(r1*sin(angle)), (float)(-width*0.5));
        u = (float)(r2*cos(angle+da) - r1*cos(angle));
        v = (float)(r2*sin(angle+da) - r1*sin(angle));
        len = (float)(sqrt(u*u + v*v));
        u /= len;
        v /= len;
        glNormal3f(v, -u, 0.0);
        glVertex3f((float)(r2*cos(angle+da)), (float)(r2*sin(angle+da)), (float)(width*0.5));
        glVertex3f((float)(r2*cos(angle+da)), (float)(r2*sin(angle+da)), (float)(-width*0.5));
        glNormal3f((float)(cos(angle)), (float)(sin(angle)), 0.0);
        glVertex3f((float)(r2*cos(angle+2*da)), (float)(r2*sin(angle+2*da)), (float)(width*0.5));
        glVertex3f((float)(r2*cos(angle+2*da)), (float)(r2*sin(angle+2*da)), (float)(-width*0.5));
        u = (float)(r1*cos(angle+3*da) - r2*cos(angle+2*da));
        v = (float)(r1*sin(angle+3*da) - r2*sin(angle+2*da));
        glNormal3f(v, -u, 0.0);
        glVertex3f((float)(r1*cos(angle+3*da)), (float)(r1*sin(angle+3*da)), (float)(width*0.5));
        glVertex3f((float)(r1*cos(angle+3*da)), (float)(r1*sin(angle+3*da)), (float)(-width*0.5));
        glNormal3f((float)(cos(angle)), (float)(sin(angle)), 0.0);
    }
    glVertex3f((float)(r1*cos(0.0)), (float)(r1*sin(0.0)), (float)(width*0.5));
    glVertex3f((float)(r1*cos(0.0)), (float)(r1*sin(0.0)), (float)(-width*0.5));
    glEnd();
    
    glShadeModel(GL_SMOOTH);
    
    /* draw inside radius cylinder */
    glBegin(GL_QUAD_STRIP);
    for (i=0;i<=teeth;i++) {
        angle = (float)(i * 2.0*pi / teeth);
        glNormal3f((float)(-cos(angle)), (float)(-sin(angle)), 0.0);
        glVertex3f((float)(r0*cos(angle)), (float)(r0*sin(angle)), (float)(-width*0.5));
        glVertex3f((float)(r0*cos(angle)), (float)(r0*sin(angle)), (float)(width*0.5));
    }
    glEnd();
}



static void drawGearGL(int id)
{
    static GLfloat pos[4] = { 5.0f, 5.0f, 10.0f, 1.0f };
    static GLfloat ared[4] = { 0.8f, 0.1f, 0.0f, 1.0f };
    static GLfloat agreen[4] = { 0.0f, 0.8f, 0.2f, 1.0f };
    static GLfloat ablue[4] = { 0.2f, 0.2f, 1.0f, 1.0f };
    
    glLightfv(GL_LIGHT0, GL_POSITION, pos);
    glEnable(GL_CULL_FACE);
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glEnable(GL_DEPTH_TEST);
    
    switch (id)
    {
    case 1:
        glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, ared);
        gearGL(1.0f, 4.0f, 1.0f, 20, 0.7f);
        break;
    case 2:
        glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, agreen);
        gearGL(0.5f, 2.0f, 2.0f, 10, 0.7f);
        break;
    case 3:
        glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, ablue);
        gearGL(1.3f, 2.0f, 0.5f, 10, 0.7f);
        break;
    default:
        break;
    }
    glEnable(GL_NORMALIZE);
}


static void drawGL(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(fAngle, 0.0, 0.0, 1.0);
    drawGearGL(1);
    glPopMatrix();
    
    glPushMatrix();
    glTranslatef(3.1f, -2.0f, 0.0f);
    glRotatef((float)(-2.0*fAngle-9.0), 0.0, 0.0, 1.0);
    drawGearGL(2);
    glPopMatrix();
    
    glPushMatrix();
    glTranslatef(-3.1f, 2.2f, -1.8f);
    glRotatef(90.0f, 1.0f, 0.0f, 0.0f);
    glRotatef((float)(2.0*fAngle-2.0), 0.0, 0.0, 1.0);
    drawGearGL(3);
    glPopMatrix();
    
    glPopMatrix();
}


static void setViewPortGL(GHOST_WindowHandle hWindow)
{
    GHOST_RectangleHandle hRect = NULL;
    GLfloat w, h;
    
    GHOST_ActivateWindowDrawingContext(hWindow);
    hRect = GHOST_GetClientBounds(hWindow);
    
    w = (float)GHOST_GetWidthRectangle(hRect) / (float)GHOST_GetHeightRectangle(hRect);
    h = 1.0;
    
    glViewport(0, 0, GHOST_GetWidthRectangle(hRect), GHOST_GetHeightRectangle(hRect));

    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glFrustum(-w, w, -h, h, 5.0, 60.0);
    /* glOrtho(0, bnds.getWidth(), 0, bnds.getHeight(), -10, 10); */
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    glTranslatef(0.0, 0.0, -40.0);
    
    glClearColor(.2f,0.0f,0.0f,0.0f);
    glClear(GL_COLOR_BUFFER_BIT);

    GHOST_DisposeRectangle(hRect);
}



int processEvent(GHOST_EventHandle hEvent, GHOST_TUserDataPtr userData)
{
    int handled = 1;
    int cursor;
    int visibility;
    GHOST_TEventKeyData* keyData = NULL;
    GHOST_TEventWheelData* wheelData = NULL;
    GHOST_DisplaySetting setting;
    GHOST_WindowHandle window = GHOST_GetEventWindow(hEvent);
    
    switch (GHOST_GetEventType(hEvent))
    {
    /*
    case GHOST_kEventUnknown:
        break;
    case GHOST_kEventCursorButton:
        break;
    case GHOST_kEventCursorMove:
        break;
    */
    case GHOST_kEventWheel:
        {
        wheelData = (GHOST_TEventWheelData*)GHOST_GetEventData(hEvent);
        if (wheelData->z > 0)
        {
            view_rotz += 5.f;
        }
        else
        {
            view_rotz -= 5.f;
        }
        }
        break;

    case GHOST_kEventKeyUp:
        break;
        
    case GHOST_kEventKeyDown:
        {
            keyData = (GHOST_TEventKeyData*)GHOST_GetEventData(hEvent);
            switch (keyData->key)
            {
            case GHOST_kKeyC:
                {
                    cursor = sCursor;
                    cursor++;
                    if (cursor >= GHOST_kStandardCursorNumCursors)
                    {
                        cursor = GHOST_kStandardCursorFirstCursor;
                    }
                    sCursor = (GHOST_TStandardCursor)cursor;
                    GHOST_SetCursorShape(window, sCursor);
                }
                break;
            case GHOST_kKeyF:
                if (!GHOST_GetFullScreen(shSystem))
                {
                    /* Begin fullscreen mode */
                    setting.bpp = 24;
                    setting.frequency = 85;
                    setting.xPixels = 640;
                    setting.yPixels = 480;
                    
                    /*
                    setting.bpp = 16;
                    setting.frequency = 75;
                    setting.xPixels = 640;
                    setting.yPixels = 480;
                    */

                    sFullScreenWindow = GHOST_BeginFullScreen(shSystem, &setting,

                        FALSE /* stereo flag */);
                }
                else
                {
                    GHOST_EndFullScreen(shSystem);
                    sFullScreenWindow = 0;
                }
                break;
            case GHOST_kKeyH:
                {
                    visibility = GHOST_GetCursorVisibility(window);
                    GHOST_SetCursorVisibility(window, !visibility);
                }
                break;
            case GHOST_kKeyQ:
                if (GHOST_GetFullScreen(shSystem))
                {
                    GHOST_EndFullScreen(shSystem);
                    sFullScreenWindow = 0;
                }
                sExitRequested = 1;
            case GHOST_kKeyT:
                if (!sTestTimer)
                {
                    sTestTimer = GHOST_InstallTimer(shSystem, 0, 1000, testTimerProc, NULL);
                }
                else
                {
                    GHOST_RemoveTimer(shSystem, sTestTimer);
                    sTestTimer = 0;
                }
                break;
            case GHOST_kKeyW:
                {
                    if (sMainWindow)
                    {
                        char *title = GHOST_GetTitle(sMainWindow);
                        char *ntitle = malloc(strlen(title)+2);

                        sprintf(ntitle, "%s-", title);
                        GHOST_SetTitle(sMainWindow, ntitle);
                        
                        free(ntitle);
                        free(title);
                    }
                }
                break;
            default:
                break;
            }
        }
        break;
        
    case GHOST_kEventWindowClose:
        {
            GHOST_WindowHandle window2 = GHOST_GetEventWindow(hEvent);
            if (window2 == sMainWindow)
            {
                sExitRequested = 1;
            }
            else
            {
                if (sGearsTimer)
                {
                    GHOST_RemoveTimer(shSystem, sGearsTimer);
                    sGearsTimer = 0;
                }
                GHOST_DisposeWindow(shSystem, window2);
            }
        }
        break;
        
    case GHOST_kEventWindowActivate:
        handled = 0;
        break;
    case GHOST_kEventWindowDeactivate:
        handled = 0;
        break;
    case GHOST_kEventWindowUpdate:
        {
            GHOST_WindowHandle window2 = GHOST_GetEventWindow(hEvent);
            if (!GHOST_ValidWindow(shSystem, window2))
                break;
            setViewPortGL(window2);
            drawGL();
            GHOST_SwapWindowBuffers(window2);
        }
        break;
        
    default:
        handled = 0;
        break;
    }
    return handled;
}


int main(int argc, char** argv)
{
    char* title1 = "gears - main window";
    char* title2 = "gears - secondary window";
    GHOST_EventConsumerHandle consumer = GHOST_CreateEventConsumer(processEvent, NULL);

    /* Create the system */
    shSystem = GHOST_CreateSystem();
    GHOST_AddEventConsumer(shSystem, consumer);
    
    if (shSystem)
    {
        /* Create the main window */
        sMainWindow = GHOST_CreateWindow(shSystem,
            title1,
            10,
            64,
            320,
            200,
            GHOST_kWindowStateNormal,
            GHOST_kDrawingContextTypeOpenGL,
            FALSE,
            FALSE);
        if (!sMainWindow)
        {
            printf("could not create main window\n");
            exit(-1);
        }
        
        /* Create a secondary window */
        sSecondaryWindow = GHOST_CreateWindow(shSystem,
            title2,
            340,
            64,
            320,
            200,
            GHOST_kWindowStateNormal,
            GHOST_kDrawingContextTypeOpenGL,
            FALSE,
            FALSE);
        if (!sSecondaryWindow)
        {
            printf("could not create secondary window\n");
            exit(-1);
        }
        
        /* Install a timer to have the gears running */
         sGearsTimer = GHOST_InstallTimer(shSystem,
            0,
            10,
            gearsTimerProc,
            sMainWindow);

        /* Enter main loop */
        while (!sExitRequested)
        {
            if (!GHOST_ProcessEvents(shSystem, 0)) 
            {
#ifdef WIN32
                /* If there were no events, be nice to other applications */
                Sleep(10);
#endif
            }
            GHOST_DispatchEvents(shSystem);
        }
    }

    /* Dispose windows */
    if (GHOST_ValidWindow(shSystem, sMainWindow))
    {
        GHOST_DisposeWindow(shSystem, sMainWindow);
    }
    if (GHOST_ValidWindow(shSystem, sSecondaryWindow))
    {
        GHOST_DisposeWindow(shSystem, sSecondaryWindow);
    }

    /* Dispose the system */
    GHOST_DisposeSystem(shSystem);
    GHOST_DisposeEventConsumer(consumer);
    
    return 0;
}


static void gearsTimerProc(GHOST_TimerTaskHandle hTask, GHOST_TUns64 time)
{
    GHOST_WindowHandle hWindow = NULL;
    fAngle += 2.0;
    view_roty += 1.0;
    hWindow = (GHOST_WindowHandle)GHOST_GetTimerTaskUserData(hTask);
    if (GHOST_GetFullScreen(shSystem))
    {
        /* Running full screen */
        GHOST_InvalidateWindow(sFullScreenWindow);
    }
    else
    {
        if (GHOST_ValidWindow(shSystem, hWindow))
        {
            GHOST_InvalidateWindow(hWindow);
        }
    }
}