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fix billboard face

This commit is contained in:
yangxiao 2014-09-03 15:28:15 +08:00
parent adda886210
commit 5a85cb405e
2 changed files with 34 additions and 26 deletions
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54
cocos/3d/CCBillBoard.cpp
View File

@ -93,36 +93,42 @@ BillBorad* BillBorad::create()
void BillBorad::draw(Renderer *renderer, const Mat4 &transform, uint32_t flags)
{
auto camera = Camera::getVisitingCamera();
const Mat4 &viewMat = camera->getViewMatrix();
// const Mat4& camWorldMat = camera->getNodeToWorldTransform();
// Vec3 camDir(transform.m[12] - camWorldMat.m[12], transform.m[13] - camWorldMat.m[13], transform.m[14] - camWorldMat.m[14]);
// camDir.normalize();
// static Vec3 upAxis(0.0f, 1.0f, 0.0f);
// Vec3 x, y;
// camWorldMat.transformVector(upAxis, &y);
// Vec3::cross(camDir, y, &x);
// x.normalize();
// Vec3::cross(x, camDir, &y);
// Mat4 newTransform;
// newTransform.m[0] = x.x; newTransform.m[1] = x.y; newTransform.m[2] = x.z;
// newTransform.m[4] = y.x; newTransform.m[5] = y.y; newTransform.m[6] = y.z;
// newTransform.m[8] = -camDir.x; newTransform.m[9] = -camDir.y; newTransform.m[10] = -camDir.z;
// newTransform.m[12] = transform.m[12]; newTransform.m[13] = transform.m[13]; newTransform.m[14] = transform.m[14];
if (memcmp(_preViewMat.m, viewMat.m, sizeof(float) * 16) != 0)
const Mat4& camWorldMat = camera->getNodeToWorldTransform();
if (memcmp(_camWorldMat.m, camWorldMat.m, sizeof(float) * 16) != 0 || memcmp(_transform.m, transform.m, sizeof(float) * 16) != 0)
{
Mat4 viewInverseMat = camera->getInverseViewMatrix();
viewInverseMat.m[12] = viewInverseMat.m[13] = viewInverseMat.m[14] = 0;
Mat4 modelViewMat = viewMat * transform;
_preViewMat = viewMat;
_zDepthInView = -modelViewMat.m[14];
_mv = viewInverseMat;
Vec3 camDir(transform.m[12] - camWorldMat.m[12], transform.m[13] - camWorldMat.m[13], transform.m[14] - camWorldMat.m[14]);
if (camDir.length() < MATH_TOLERANCE)
{
camDir.set(camWorldMat.m[8], camWorldMat.m[9], camWorldMat.m[10]);
}
camDir.normalize();
static Vec3 upAxis(0.0f, 1.0f, 0.0f);
Vec3 x, y;
camWorldMat.transformVector(upAxis, &y);
Vec3::cross(camDir, y, &x);
x.normalize();
Vec3::cross(x, camDir, &y);
float xlen = sqrtf(transform.m[0] * transform.m[0] + transform.m[1] * transform.m[1] + transform.m[2] * transform.m[2]);
float ylen = sqrtf(transform.m[4] * transform.m[4] + transform.m[5] * transform.m[5] + transform.m[6] * transform.m[6]);
float zlen = sqrtf(transform.m[8] * transform.m[8] + transform.m[9] * transform.m[9] + transform.m[10] * transform.m[10]);
_billboardTransform.m[0] = x.x * xlen; _billboardTransform.m[1] = x.y * xlen; _billboardTransform.m[2] = x.z * xlen;
_billboardTransform.m[4] = y.x * ylen; _billboardTransform.m[5] = y.y * ylen; _billboardTransform.m[6] = y.z * ylen;
_billboardTransform.m[8] = -camDir.x * zlen; _billboardTransform.m[9] = -camDir.y * zlen; _billboardTransform.m[10] = -camDir.z * zlen;
_billboardTransform.m[12] = transform.m[12]; _billboardTransform.m[13] = transform.m[13]; _billboardTransform.m[14] = transform.m[14];
const Mat4 &viewMat = camWorldMat.getInversed();
_zDepthInView = -(viewMat.m[2] * transform.m[12] + viewMat.m[6] * transform.m[13] + viewMat.m[10] * transform.m[14] + viewMat.m[14]);
_transform = transform;
_camWorldMat = camWorldMat;
}
//FIXME: frustum culling here
{
_quadCommand.init(_zDepthInView, _texture->getName(), getGLProgramState(), _blendFunc, &_quad, 1, newTransform/*transform * _mv*/);
_quadCommand.init(_zDepthInView, _texture->getName(), getGLProgramState(), _blendFunc, &_quad, 1, _billboardTransform);
renderer->addTransparentCommand(&_quadCommand);
}
}

6
cocos/3d/CCBillBoard.h
View File

@ -87,8 +87,10 @@ CC_CONSTRUCTOR_ACCESS:
protected:
Mat4 _preViewMat;
Mat4 _mv;
Mat4 _camWorldMat;
Mat4 _transform;
Mat4 _billboardTransform;
float _zDepthInView;
private: