コード例 #1
0
ファイル: Object_ss.cpp プロジェクト: freesynapse/2_0
void Object::UpdateObjectMatrix()
{
	Matrix4f mTranslate(MATRIX_TRANSLATE, m_vWorldPos);
	Matrix4f mRotate(MATRIX_ROTATE, m_qRotation);
	Matrix4f mScale(MATRIX_SCALE, m_vScale);

	m_mModelMatrix = mTranslate * mRotate * mScale;
	//m_mModelMatrix.Print("Model");

} // end Object::UpdateObjectMatrix()
コード例 #2
0
ファイル: slice_renderer.cpp プロジェクト: Herschel/scummvm
void SliceRenderer::calculateBoundingRect() {
	assert(_sliceFramePtr);

	_screenRectangle.left   = 0;
	_screenRectangle.right  = 0;
	_screenRectangle.top    = 0;
	_screenRectangle.bottom = 0;

	Matrix4x3 viewMatrix = _view->_sliceViewMatrix;

	Vector3 frameBottom = Vector3(0.0f, 0.0f, _frameBottomZ);
	Vector3 frameTop    = Vector3(0.0f, 0.0f, _frameBottomZ + _frameSliceCount * _frameSliceHeight);

	Vector3 bottom = viewMatrix * (_position + frameBottom);
	Vector3 top    = viewMatrix * (_position + frameTop);

	top = bottom + _scale * (top - bottom);

	if (bottom.z <= 0.0f || top.z <= 0.0f) {
		return;
	}

	Matrix3x2 facingRotation = calculateFacingRotationMatrix();

	Matrix3x2 mProjection(_view->_viewportPosition.z / bottom.z,  0.0f, 0.0f,
	                                                       0.0f, 25.5f, 0.0f);

	Matrix3x2 mOffset(1.0f, 0.0f, _framePos.x,
                      0.0f, 1.0f, _framePos.y);

	Matrix3x2 mScale(_frameScale.x,          0.0f, 0.0f,
	                          0.0f, _frameScale.y, 0.0f);

	_mvpMatrix = mProjection * (facingRotation * (mOffset * mScale));

	Vector4 startScreenVector(
	           _view->_viewportPosition.x + (top.x / top.z) * _view->_viewportPosition.z,
	           _view->_viewportPosition.y + (top.y / top.z) * _view->_viewportPosition.z,
	           1.0f / top.z,
	           _frameSliceCount * (1.0f / top.z));

	Vector4 endScreenVector(
	           _view->_viewportPosition.x + (bottom.x / bottom.z) * _view->_viewportPosition.z,
	           _view->_viewportPosition.y + (bottom.y / bottom.z) * _view->_viewportPosition.z,
	           1.0f / bottom.z,
	           0.0f);

	Vector4 delta = endScreenVector - startScreenVector;

	if (delta.y == 0.0f) {
		return;
	}

	/*
	 * Calculate min and max Y
	 */

	float screenTop    =   0.0f;
	float screenBottom = 479.0f;

	if (startScreenVector.y < screenTop) {
		if (endScreenVector.y < screenTop) {
			return;
		}
		float f = (screenTop - startScreenVector.y) / delta.y;
		startScreenVector = startScreenVector + f * delta;
	} else if (startScreenVector.y > screenBottom) {
		if (endScreenVector.y >= screenBottom) {
			return;
		}
		float f = (screenBottom - startScreenVector.y) / delta.y;
		startScreenVector = startScreenVector + f * delta;
	}

	if (endScreenVector.y < screenTop) {
		float f = (screenTop - endScreenVector.y) / delta.y;
		endScreenVector = endScreenVector + f * delta;
	} else if (endScreenVector.y > screenBottom) {
		float f = (screenBottom - endScreenVector.y) / delta.y;
		endScreenVector = endScreenVector + f * delta;
	}

	_screenRectangle.top    = (int)MIN(startScreenVector.y, endScreenVector.y);
	_screenRectangle.bottom = (int)MAX(startScreenVector.y, endScreenVector.y) + 1;

	/*
	 * Calculate min and max X
	 */

	Matrix3x2 mStart(
		1.0f, 0.0f, startScreenVector.x,
		0.0f, 1.0f, 25.5f / startScreenVector.z
	);

	Matrix3x2 mEnd(
		1.0f, 0.0f, endScreenVector.x,
		0.0f, 1.0f, 25.5f / endScreenVector.z
	);

	Matrix3x2 mStartMVP = mStart * _mvpMatrix;
	Matrix3x2 mEndMVP   = mEnd   * _mvpMatrix;

	float minX =  640.0f;
	float maxX =    0.0f;

	for (float i = 0.0f; i <= 256.0f; i += 255.0f) {
		for (float j = 0.0f; j <= 256.0f; j += 255.0f) {
			Vector2 v1 = mStartMVP * Vector2(i, j);
			minX = MIN(minX, v1.x);
			maxX = MAX(maxX, v1.x);

			Vector2 v2 = mEndMVP * Vector2(i, j);
			minX = MIN(minX, v2.x);
			maxX = MAX(maxX, v2.x);
		}
	}

	_screenRectangle.left  = CLIP((int)minX,     0, 640);
	_screenRectangle.right = CLIP((int)maxX + 1, 0, 640);

	_startScreenVector.x = startScreenVector.x;
	_startScreenVector.y = startScreenVector.y;
	_startScreenVector.z = startScreenVector.z;
	_endScreenVector.x   = endScreenVector.x;
	_endScreenVector.y   = endScreenVector.y;
	_endScreenVector.z   = endScreenVector.z;
	_startSlice          = startScreenVector.w;
	_endSlice            = endScreenVector.w;
}