void GLInstancingRenderer::updateCamera()
{
GLint err = glGetError();
b3Assert(err==GL_NO_ERROR);
int m_forwardAxis(2);
float m_frustumZNear=1;
float m_frustumZFar=10000.f;
// m_azi=m_azi+0.01;
b3Scalar rele = m_data->m_ele * b3Scalar(0.01745329251994329547);// rads per deg
b3Scalar razi = m_data->m_azi * b3Scalar(0.01745329251994329547);// rads per deg
b3Quaternion rot(m_data->m_cameraUp,razi);
b3Vector3 eyePos = b3MakeVector3(0,0,0);
eyePos[m_forwardAxis] = -m_data->m_cameraDistance;
b3Vector3 forward = b3MakeVector3(eyePos[0],eyePos[1],eyePos[2]);
if (forward.length2() < B3_EPSILON)
{
forward.setValue(1.f,0.f,0.f);
}
b3Vector3 right = m_data->m_cameraUp.cross(forward);
b3Quaternion roll(right,-rele);
eyePos = b3Matrix3x3(rot) * b3Matrix3x3(roll) * eyePos;
m_data->m_cameraPosition[0] = eyePos.x;
m_data->m_cameraPosition[1] = eyePos.y;
m_data->m_cameraPosition[2] = eyePos.z;
m_data->m_cameraPosition += m_data->m_cameraTargetPosition;
if (m_screenWidth == 0 && m_screenHeight == 0)
return;
b3Scalar aspect;
b3Vector3 extents;
aspect = m_screenWidth / (b3Scalar)m_screenHeight;
extents.setValue(aspect * 1.0f, 1.0f,0);
if (m_screenWidth > m_screenHeight)
{
b3CreateFrustum(-aspect * m_frustumZNear, aspect * m_frustumZNear, -m_frustumZNear, m_frustumZNear, m_frustumZNear, m_frustumZFar,projectionMatrix);
} else
{
b3CreateFrustum(-aspect * m_frustumZNear, aspect * m_frustumZNear, -m_frustumZNear, m_frustumZNear, m_frustumZNear, m_frustumZFar,projectionMatrix);
}
b3CreateLookAt(m_data->m_cameraPosition,m_data->m_cameraTargetPosition,m_data->m_cameraUp,modelviewMatrix);
}
void SimpleCamera::getCameraProjectionMatrix(float projectionMatrix[16]) const
{
b3CreateFrustum(-m_data->m_aspect * m_data->m_frustumZNear, m_data->m_aspect * m_data->m_frustumZNear, -m_data->m_frustumZNear,m_data->m_frustumZNear, m_data->m_frustumZNear, m_data->m_frustumZFar,projectionMatrix);
}
