本文整理汇总了C++中Mat4::rotateZ方法的典型用法代码示例。如果您正苦于以下问题：C++ Mat4::rotateZ方法的具体用法？C++ Mat4::rotateZ怎么用？C++ Mat4::rotateZ使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Mat4的用法示例。
在下文中一共展示了Mat4::rotateZ方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: normalisedRoll
//----------------------------------------------------------------------------------------------------------------------
void Camera::normalisedRoll(Real _angle ) noexcept
{
// build a rotation matrix around the y axis
Mat4 mat;
mat.identity();
mat.rotateZ(_angle);
//multiply all three local coord vectors by the matrix
m_u = m_u * mat;
m_v = m_v * mat;
m_n = m_n * mat;
// reset the modelview matrix
setViewMatrix();
}示例2: draw
void BillBoard::draw(Renderer *renderer, const Mat4 &transform, uint32_t flags)
{
auto camera = Camera::getVisitingCamera();
const Mat4& camWorldMat = camera->getNodeToWorldTransform();
if (memcmp(_camWorldMat.m, camWorldMat.m, sizeof(float) * 16) != 0 || memcmp(_mvTransform.m, transform.m, sizeof(float) * 16) != 0 || _modeDirty)
{
Vec3 anchorPoint(_anchorPointInPoints.x , _anchorPointInPoints.y , 0.0f);
Mat4 localToWorld = transform;
localToWorld.translate(anchorPoint);
Vec3 camDir;
switch (_mode)
{
case Mode::VIEW_POINT_ORIENTED:
camDir = Vec3(localToWorld.m[12] - camWorldMat.m[12], localToWorld.m[13] - camWorldMat.m[13], localToWorld.m[14] - camWorldMat.m[14]);
break;
case Mode::VIEW_PLANE_ORIENTED:
camWorldMat.transformVector(Vec3(0.0f, 0.0f, -1.0f), &camDir);
break;
default:
CCASSERT(false, "invalid billboard mode");
break;
}
_modeDirty = false;
if (camDir.length() < MATH_TOLERANCE)
{
camDir.set(camWorldMat.m[8], camWorldMat.m[9], camWorldMat.m[10]);
}
camDir.normalize();
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);
Vec3 upAxis = Vec3(rotationMatrix.m[4],rotationMatrix.m[5],rotationMatrix.m[6]);
Vec3 x, y;
camWorldMat.transformVector(upAxis, &y);
Vec3::cross(camDir, y, &x);
x.normalize();
Vec3::cross(x, camDir, &y);
y.normalize();
float xlen = sqrtf(localToWorld.m[0] * localToWorld.m[0] + localToWorld.m[1] * localToWorld.m[1] + localToWorld.m[2] * localToWorld.m[2]);
float ylen = sqrtf(localToWorld.m[4] * localToWorld.m[4] + localToWorld.m[5] * localToWorld.m[5] + localToWorld.m[6] * localToWorld.m[6]);
float zlen = sqrtf(localToWorld.m[8] * localToWorld.m[8] + localToWorld.m[9] * localToWorld.m[9] + localToWorld.m[10] * localToWorld.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] = localToWorld.m[12]; _billboardTransform.m[13] = localToWorld.m[13]; _billboardTransform.m[14] = localToWorld.m[14];
_billboardTransform.translate(-anchorPoint);
const Mat4 &viewMat = camWorldMat.getInversed();
_zDepthInView = -(viewMat.m[2] * _billboardTransform.m[12] + viewMat.m[6] * _billboardTransform.m[13] + viewMat.m[10] * _billboardTransform.m[14] + viewMat.m[14]);
_mvTransform = transform;
_camWorldMat = camWorldMat;
}
//FIXME: frustum culling here
{
_quadCommand.init(_zDepthInView, _texture->getName(), getGLProgramState(), _blendFunc, &_quad, 1, _billboardTransform);
_quadCommand.setTransparent(true);
renderer->addCommand(&_quadCommand);
}
}