#ifndef _MAININCLUDES_

#include "main.h"

#endif

void MyMoveSprites (void)

{

    short               nIndex;

    MatrixRecord                matrix;

    SetIdentityMatrix(&matrix);

    // for each sprite

    for (nIndex = 0; nIndex < kNumSprites; nIndex++) {

        // modify the spriteÕs matrix

        OffsetRect(&gDestRects[nIndex], gDeltas[nIndex].h,

                    gDeltas[nIndex].v);

        if ((gDestRects[nIndex].right >= gBounceBox.right) ||

            (gDestRects[nIndex].left <= gBounceBox.left))

            gDeltas[nIndex].h = -gDeltas[nIndex].h;

        if ((gDestRects[nIndex].bottom >= gBounceBox.bottom) ||

            (gDestRects[nIndex].top <= gBounceBox.top))

            gDeltas[nIndex].v = -gDeltas[nIndex].v;

        matrix.matrix[2][0] = ((long)gDestRects[nIndex].left << 16);

        matrix.matrix[2][1] = ((long)gDestRects[nIndex].top << 16);

        SetSpriteProperty(gSprites[nIndex],         /* the sprite for this operation */

                            kSpritePropertyMatrix,  /* the property to be set */

                            &matrix);               /* the new value for the property */

        // change the spriteÕs image

        gCurrentImages[nIndex]++;

        if (gCurrentImages[nIndex] >= (kNumSpaceShipImages *

                                        (nIndex+1)))

        {

            gCurrentImages[nIndex] = 0;

        }

        SetSpriteProperty(gSprites[nIndex],

                        kSpritePropertyImageDataPtr,

                        *gCompressedPictures[gCurrentImages[nIndex] / (nIndex+1)]);

    }

}