// My3dSupport.c - QuickDraw 3d routines

//

// This file contains utility routines for QuickDraw 3d sample code.

// This is a simple QuickDraw 3d application to draw a cube in the center 

// of the main application window.  The routines in here handle setting up

// the main display group, the view, the Macintosh 3D draw context, and the

// camera and lighting. 

//

// This code is the basis of the introductory article in  d e v e l o p  issue 22

//

// Nick Thompson - January 6th 1994

// 

// ©1994-95 Apple computer Inc., All Rights Reserved

//

#include <QuickDraw.h>

#include <QDOffScreen.h>

#include "MarkerPickSupport.h"

#include "QD3DDrawContext.h"

#include "QD3DRenderer.h"

#include "QD3DShader.h"

#include "QD3DCamera.h"

#include "QD3DLight.h"

#include "QD3DGeometry.h"

#include "QD3DGroup.h"

#include "QD3DMath.h"

#include "QD3DSet.h"

#include "QD3DTransform.h"

#include "QD3DAcceleration.h"

static  TQ3Point3D  documentGroupCenter;

static  float       documentGroupScale;

TQ3ViewObject MyNewView(WindowPtr theWindow)

{

    TQ3Status               myStatus;

    TQ3ViewObject           myView;

    TQ3DrawContextObject        myDrawContext;

    TQ3RendererObject       myRenderer;

    TQ3CameraObject         myCamera;

    TQ3GroupObject          myLights;

    myView = Q3View_New();

    //  Create and set draw context.

    if ((myDrawContext = MyNewDrawContext(theWindow)) == nil )

        goto bail;

    if ((myStatus = Q3View_SetDrawContext(myView, myDrawContext)) == kQ3Failure )

        goto bail;

    Q3Object_Dispose( myDrawContext ) ;

    //  Create and set renderer.

    // this would use the Z-Buffer renderer

#if 0

    myRenderer = Q3Renderer_NewFromType(kQ3RendererTypeWireFrame);

    if ((myStatus = Q3View_SetRenderer(myView, myRenderer)) == kQ3Failure ) {

        goto bail;

    }

#else

    // this would use the interactive software renderer

    if ((myRenderer = Q3Renderer_NewFromType(kQ3RendererTypeInteractive)) != nil ) {

        if ((myStatus = Q3View_SetRenderer(myView, myRenderer)) == kQ3Failure ) {

            goto bail;

        }

        // these two lines set us up to use the best possible renderer,

        // including  hardware if it is installed.

        Q3InteractiveRenderer_SetDoubleBufferBypass (myRenderer, kQ3True);                      

        Q3InteractiveRenderer_SetPreferences(myRenderer, kQAVendor_BestChoice, 0);

    }

    else {

        goto bail;

    }

#endif

    Q3Object_Dispose( myRenderer ) ;

    //  Create and set camera.

    if ( (myCamera = MyNewCamera(theWindow)) == nil )

        goto bail;

    if ((myStatus = Q3View_SetCamera(myView, myCamera)) == kQ3Failure )

        goto bail;

    Q3Object_Dispose( myCamera ) ;

    //  Create and set lights.

    if ((myLights = MyNewLights()) == nil )

        goto bail;

    if ((myStatus = Q3View_SetLightGroup(myView, myLights)) == kQ3Failure )

        goto bail;

    Q3Object_Dispose(myLights);

    //  Done!!!

    return ( myView );

bail:

    //  If any of the above failed, then don't return a view.

    return ( nil );

}

//----------------------------------------------------------------------------------

TQ3DrawContextObject MyNewDrawContext(WindowPtr theWindow)

{

    TQ3DrawContextData      myDrawContextData;

    TQ3MacDrawContextData   myMacDrawContextData;

    TQ3ColorARGB            ClearColor;

    TQ3DrawContextObject    myDrawContext ;

    //  Set the background color.

    ClearColor.a = 1.0;

    ClearColor.r = 1.0;

    ClearColor.g = 1.0;

    ClearColor.b = 1.0;

    //  Fill in draw context data.

    myDrawContextData.clearImageMethod = kQ3ClearMethodWithColor;

    myDrawContextData.clearImageColor = ClearColor;

    myDrawContextData.paneState = kQ3False;

    myDrawContextData.maskState = kQ3False;

    myDrawContextData.doubleBufferState = kQ3True;

    myMacDrawContextData.drawContextData = myDrawContextData;

    myMacDrawContextData.window = (CGrafPtr) theWindow;     // this is the window associated with the view

    myMacDrawContextData.library = kQ3Mac2DLibraryNone;

    myMacDrawContextData.viewPort = nil;

    myMacDrawContextData.grafPort = nil;

    //  Create draw context and return it, if itÕs nil the caller must handle

    myDrawContext = Q3MacDrawContext_New(&myMacDrawContextData) ;

    return myDrawContext ;

}

//----------------------------------------------------------------------------------

TQ3CameraObject MyNewCamera(WindowPtr theWindow)

{

    TQ3ViewAngleAspectCameraData    perspectiveData;

    TQ3CameraObject             camera;

    TQ3Point3D                  from    = { 0.0, 0.0, 7.0 };

    TQ3Point3D                  to      = { 0.0, 0.0, 0.0 };

    TQ3Vector3D                 up      = { 0.0, 1.0, 0.0 };

    float                       fieldOfView = 1.0;

    float                       hither      = 0.001;

    float                       yon         = 1000;

    TQ3Status                   returnVal = kQ3Failure ;

    perspectiveData.cameraData.placement.cameraLocation     = from;

    perspectiveData.cameraData.placement.pointOfInterest    = to;

    perspectiveData.cameraData.placement.upVector           = up;

    perspectiveData.cameraData.range.hither = hither;

    perspectiveData.cameraData.range.yon    = yon;

    perspectiveData.cameraData.viewPort.origin.x = -1.0;

    perspectiveData.cameraData.viewPort.origin.y = 1.0;

    perspectiveData.cameraData.viewPort.width = 2.0;

    perspectiveData.cameraData.viewPort.height = 2.0;

    perspectiveData.fov             = fieldOfView;

    perspectiveData.aspectRatioXToY =

        (float) (theWindow->portRect.right - theWindow->portRect.left) / 

        (float) (theWindow->portRect.bottom - theWindow->portRect.top);

    camera = Q3ViewAngleAspectCamera_New(&perspectiveData);

    return camera ;

}

//----------------------------------------------------------------------------------

TQ3GroupObject MyNewLights()

{

    TQ3GroupPosition        myGroupPosition;

    TQ3GroupObject          myLightList;

    TQ3LightData            myLightData;

    TQ3PointLightData       myPointLightData;

    TQ3DirectionalLightData myDirectionalLightData;

    TQ3LightObject          myAmbientLight, myPointLight, myFillLight;

    TQ3Point3D              pointLocation = { -10.0, 0.0, 10.0 };

    TQ3Vector3D             fillDirection = { 10.0, 0.0, 10.0 };

    TQ3ColorRGB             WhiteLight = { 1.0, 1.0, 1.0 };

    //  Set up light data for ambient light.  This light data will be used for point and fill

    //  light also.

    myLightData.isOn = kQ3True;

    myLightData.color = WhiteLight;

    //  Create ambient light.

    myLightData.brightness = .2;

    myAmbientLight = Q3AmbientLight_New(&myLightData);

    if ( myAmbientLight == nil )

        goto bail;

    //  Create point light.

    myLightData.brightness = 1.0;

    myPointLightData.lightData = myLightData;

    myPointLightData.castsShadows = kQ3False;

    myPointLightData.attenuation = kQ3AttenuationTypeNone;

    myPointLightData.location = pointLocation;

    myPointLight = Q3PointLight_New(&myPointLightData);

    if ( myPointLight == nil )

        goto bail;

    //  Create fill light.

    myLightData.brightness = .2;

    myDirectionalLightData.lightData = myLightData;

    myDirectionalLightData.castsShadows = kQ3False;

    myDirectionalLightData.direction = fillDirection;

    myFillLight = Q3DirectionalLight_New(&myDirectionalLightData);

    if ( myFillLight == nil )

        goto bail;

    //  Create light group and add each of the lights into the group.

    myLightList = Q3LightGroup_New();

    if ( myLightList == nil )

        goto bail;

    myGroupPosition = Q3Group_AddObject(myLightList, myAmbientLight);

    if ( myGroupPosition == 0 )

        goto bail;

    myGroupPosition = Q3Group_AddObject(myLightList, myPointLight);

    if ( myGroupPosition == 0 )

        goto bail;

    myGroupPosition = Q3Group_AddObject(myLightList, myFillLight);

    if ( myGroupPosition == 0 )

        goto bail;

    Q3Object_Dispose( myAmbientLight ) ;

    Q3Object_Dispose( myPointLight ) ;

    Q3Object_Dispose( myFillLight ) ;

    //  Done!

    return ( myLightList );

bail:

    //  If any of the above failed, then return nothing!

    return ( nil );

}

TQ3GroupObject MyNewModel()

{

    TQ3GroupObject  myGroup = NULL;

    TQ3Object       myMarker = NULL;

    TQ3MarkerData   markerData;

    unsigned char   memory[1000];

    unsigned char*  ptr;

    long            i;

    // Create a group for the complete model.

    if ((myGroup = Q3DisplayGroup_New()) != NULL ) {

        // set up the marker

        Q3Point3D_Set(&markerData.location, 0.0, 0.0, 0.0);

        markerData.xOffset          = -2;

        markerData.yOffset          = -15;

        markerData.bitmap.image     = memory;

        markerData.bitmap.width     = 30;

        markerData.bitmap.height    = 30;

        markerData.bitmap.rowBytes  = Q3Bitmap_GetImageSize(30, 30) / 30;

        markerData.bitmap.bitOrder  = kQ3EndianBig;

        markerData.markerAttributeSet = NULL;

        // brute force method to set up the bitmap

        ptr = markerData.bitmap.image;

        for (i=0; i<8; i++)

            {

            *ptr++ = 0xff;

            *ptr++ = 0xff;

            *ptr++ = 0xff;

            *ptr++ = 0xff;

            }

        for (i=0; i<14; i++)

            {

            *ptr++ = 0xfc;

            *ptr++ = 0x00;

            *ptr++ = 0x00;

            *ptr++ = 0xff;

            }

        for (i=0; i<8; i++)

            {

            *ptr++ = 0xff;

            *ptr++ = 0xff;

            *ptr++ = 0xff;

            *ptr++ = 0xff;

            }

        // now create the marker

        myMarker = Q3Marker_New(&markerData);

        Q3Group_AddObject(myGroup, myMarker);   

        // dispose of the objects we created here

        if( myMarker ) 

            Q3Object_Dispose(myMarker);

    }

    //  Done!

    return ( myGroup );

}