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fix billboard

This commit is contained in:
yangxiao 2015-01-28 15:21:57 +08:00
parent 4211b8d07d
commit fc1dbf49fb
2 changed files with 17 additions and 7 deletions
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23
cocos/3d/CCBillBoard.cpp
View File

@ -102,6 +102,9 @@ void BillBoard::visit(Renderer *renderer, const Mat4& parentTransform, uint32_t
{
return;
}
bool visibleByCamera = isVisitableByVisitingCamera();
if (!visibleByCamera && _children.empty())
return;
uint32_t flags = processParentFlags(parentTransform, parentFlags);
@ -119,7 +122,7 @@ void BillBoard::visit(Renderer *renderer, const Mat4& parentTransform, uint32_t
director->pushMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
director->loadMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW, _modelViewTransform);
bool visibleByCamera = isVisitableByVisitingCamera();
int i = 0;
@ -158,7 +161,7 @@ bool BillBoard::calculateBillbaordTransform()
const Mat4& camWorldMat = camera->getNodeToWorldTransform();
//TODO: use math lib to calculate math lib Make it easier to read and maintain
if (memcmp(_camWorldMat.m, camWorldMat.m, sizeof(float) * 16) != 0 || _transformDirty || _modeDirty)
if (memcmp(_camWorldMat.m, camWorldMat.m, sizeof(float) * 16) != 0 || memcmp(_mvTransform.m, _modelViewTransform.m, sizeof(float) * 16) != 0 || _modeDirty || true)
{
//Rotate based on anchor point
Vec3 anchorPoint(_anchorPointInPoints.x , _anchorPointInPoints.y , 0.0f);
@ -190,12 +193,18 @@ bool BillBoard::calculateBillbaordTransform()
Quaternion rotationQuaternion;
this->getNodeToWorldTransform().getRotation(&rotationQuaternion);
// fetch the rotation angle of z
float rotationZ = atan2(2*(rotationQuaternion.w*rotationQuaternion.z + rotationQuaternion.x*rotationQuaternion.y),
(1 - 2* (rotationQuaternion.y*rotationQuaternion.y + rotationQuaternion.z *rotationQuaternion.z)));
Mat4 rotationMatrix;
rotationMatrix.setIdentity();
rotationMatrix.rotateZ(rotationZ);
///FIXME: maybe should keep rotation along z axis
// if (rotationQuaternion.z > 0)
// {
// //rotate z only, keep it
// // fetch the rotation angle of z
// float rotationZ = atan2(2*(rotationQuaternion.w*rotationQuaternion.z + rotationQuaternion.x*rotationQuaternion.y),
// (1 - 2* (rotationQuaternion.y*rotationQuaternion.y + rotationQuaternion.z *rotationQuaternion.z)));
// rotationMatrix.rotateZ(rotationZ);
// }
Vec3 upAxis = Vec3(rotationMatrix.m[4],rotationMatrix.m[5],rotationMatrix.m[6]);
Vec3 x, y;
@ -217,7 +226,7 @@ bool BillBoard::calculateBillbaordTransform()
billboardTransform.m[12] = localToWorld.m[12]; billboardTransform.m[13] = localToWorld.m[13]; billboardTransform.m[14] = localToWorld.m[14];
billboardTransform.translate(-anchorPoint);
_modelViewTransform = billboardTransform;
_mvTransform = _modelViewTransform = billboardTransform;
_camWorldMat = camWorldMat;

1
cocos/3d/CCBillBoard.h
View File

@ -105,6 +105,7 @@ protected:
bool calculateBillbaordTransform();
Mat4 _camWorldMat;
Mat4 _mvTransform;
Mode _mode;
bool _modeDirty;