/** Gets camera frustum (3D box for 2D camera)
* @param[in] _pstCamera Concerned camera
* @param[out] _pstFrustum Frustum box
* @return Frustum orxAABOX
*/
orxAABOX *orxFASTCALL orxCamera_GetFrustum(const orxCAMERA *_pstCamera, orxAABOX *_pstFrustum)
{
orxVECTOR vPosition;
/* Checks */
orxASSERT(sstCamera.u32Flags & orxCAMERA_KU32_STATIC_FLAG_READY);
orxSTRUCTURE_ASSERT(_pstCamera);
orxASSERT(_pstFrustum != orxNULL);
/* Gets camera position */
orxFrame_GetPosition(_pstCamera->pstFrame, orxFRAME_SPACE_GLOBAL, &vPosition);
/* Stores frustum */
orxVector_Add(&(_pstFrustum->vTL), &(_pstCamera->stFrustum.vTL), &vPosition);
orxVector_Add(&(_pstFrustum->vBR), &(_pstCamera->stFrustum.vBR), &vPosition);
/* Done! */
return _pstFrustum;
}
/** Updates trail
*/
static void orxFASTCALL orxBounce_UpdateTrail(const orxCLOCK_INFO *_pstClockInfo, void *_pContext)
{
orxU32 i;
orxVECTOR vMousePos;
/* Gets mouse position */
orxMouse_GetPosition(&vMousePos);
/* Updates trail timer */
sfTrailTimer -= _pstClockInfo->fDT;
/* Should add new segment? */
if(sfTrailTimer <= orxFLOAT_0)
{
/* Pushes bounce section */
orxConfig_PushSection("Bounce");
/* Resets trail timer */
sfTrailTimer = orxConfig_GetFloat("TrailTimer");
/* Adds it to the trail */
orxVector_Copy(&savTrailPointList[su32TrailIndex], &vMousePos);
/* Gets its speed */
orxConfig_GetVector("TrailSpeed", &savTrailSpeedList[su32TrailIndex]);
/* Pops config section */
orxConfig_PopSection();
/* Updates trail index */
su32TrailIndex = (su32TrailIndex + 1) % TRAIL_POINT_NUMBER;
}
else
{
/* Keeps last created point on pos */
orxVector_Copy(&savTrailPointList[(su32TrailIndex == 0) ? TRAIL_POINT_NUMBER - 1 : su32TrailIndex - 1], &vMousePos);
}
/* For all segments */
for(i = 0; i < TRAIL_POINT_NUMBER; i++)
{
orxVECTOR vTemp;
/* Updates its position */
orxVector_Add(&savTrailPointList[i], &savTrailPointList[i], orxVector_Mulf(&vTemp, &savTrailSpeedList[i], _pstClockInfo->fDT));
}
}
/** Displays trail
*/
static void orxBounce_DisplayTrail(const orxBITMAP *_pstBitmap)
{
#define STORE_VERTEX(INDEX, X, Y, U, V, RGBA) astVertexList[INDEX].fX = X; astVertexList[INDEX].fY = Y; astVertexList[INDEX].fU = U; astVertexList[INDEX].fV = V; astVertexList[INDEX].stRGBA = RGBA;
orxDISPLAY_VERTEX astVertexList[TRAIL_POINT_NUMBER * 2];
orxVECTOR vOffset;
orxU32 i;
/* For all points */
for(i = 0; i < TRAIL_POINT_NUMBER; i++)
{
orxVECTOR vVertex1, vVertex2;
orxU32 u32Index, u32NextIndex;
/* Gets barrel indices */
u32Index = (i + su32TrailIndex) % TRAIL_POINT_NUMBER;
u32NextIndex = (i + 1 + su32TrailIndex) % TRAIL_POINT_NUMBER;
/* Not at the end? */
if(i < TRAIL_POINT_NUMBER - 1)
{
/* Gets offset vector */
orxVector_Mulf(&vOffset, orxVector_Normalize(&vOffset, orxVector_2DRotate(&vOffset, orxVector_Sub(&vOffset, &savTrailPointList[u32NextIndex], &savTrailPointList[u32Index]), orxMATH_KF_PI_BY_2)), orx2F(40.0f) / orxMath_Pow(orxS2F(i), orx2F(0.6f)));
}
/* Computes vertices positions */
orxVector_Add(&vVertex1, &savTrailPointList[u32Index], &vOffset);
orxVector_Sub(&vVertex2, &savTrailPointList[u32Index], &vOffset);
/* Stores vertices */
STORE_VERTEX(i * 2, vVertex1.fX, vVertex1.fY, orxFLOAT_0, orxU2F(i) / orxU2F(TRAIL_POINT_NUMBER - 1), orx2RGBA(0xFF, 0xFF, 0xFF, 0xFF * i / (TRAIL_POINT_NUMBER + 50)));
STORE_VERTEX(i * 2 + 1, vVertex2.fX, vVertex2.fY, orxFLOAT_1, orxU2F(i) / orxU2F(TRAIL_POINT_NUMBER - 1), orx2RGBA(0xFF, 0xFF, 0xFF, 0xFF * i / (TRAIL_POINT_NUMBER + 50)));
}
/* Draws trail */
orxDisplay_DrawMesh(_pstBitmap, orxDISPLAY_SMOOTHING_ON, orxDISPLAY_BLEND_MODE_ALPHA, TRAIL_POINT_NUMBER * 2, astVertexList);
}
