//------------------------------------------------------------------------
//Name: UpdateCamera()
//Desc: This function takes input from the user and update the scene according to user input.
//------------------------------------------------------------------------
VOID CMyD3DApplication::UpdateCamera()
{
FLOAT fElapsedTime;
if( m_fElapsedTime > 0.0f )
fElapsedTime = m_fElapsedTime;
else
fElapsedTime = 0.05f;
FLOAT fSpeed = 15.0f*fElapsedTime;
FLOAT fAngularSpeed = 1.0f*fElapsedTime;
// De-accelerate the camera movement (for smooth motion)
m_vVelocity *= 0.9f;
m_fYawVelocity *= 0.9f;
// m_fPitchVelocity *= 0.9f;
// Process keyboard input
if( m_bKey[VK_RIGHT] ) m_vVelocity.x += fSpeed; // Slide Right
if( m_bKey[VK_LEFT] ) m_vVelocity.x -= fSpeed; // Slide Left
if( m_bKey[VK_UP] ) m_vVelocity.z += fSpeed; // Move Forward
if( m_bKey[VK_DOWN] ) m_vVelocity.z -= fSpeed; // Move Backward
if( m_bKey['E'] ) m_fYawVelocity += fSpeed; // Turn Right
if( m_bKey['Q'] ) m_fYawVelocity -= fSpeed; // Turn Left
// if( m_bKey['Z'] ) m_fPitchVelocity += fSpeed; // Turn Down
// if( m_bKey['A'] ) m_fPitchVelocity -= fSpeed; // Turn Up
// Update the position vector
D3DXVECTOR3 vT = m_vVelocity * fSpeed;
D3DXVec3TransformNormal( &vT, &vT, &m_matOrientation );
m_vPosition += vT;
if( m_vPosition.y < 1.0f )
m_vPosition.y = 1.0f;
// Update the yaw-pitch-rotation vector
m_fYaw += fAngularSpeed * m_fYawVelocity;
// Set the view matrix
D3DXQUATERNION qR;
D3DXQuaternionRotationYawPitchRoll( &qR, m_fYaw, NULL, 0.0f );
// D3DXMatrixAffineTransformation( &m_matView, 1.25f, NULL, &qR, &m_vPosition );
D3DXMatrixAffineTransformation( &m_matOrientation, 1.25f, NULL, &qR, &m_vPosition );
D3DXMatrixInverse( &m_matView, NULL, &m_matOrientation );
m_pd3dDevice->SetTransform( D3DTS_VIEW, &m_matView );
}
camera movements
Author
I am making 3d virtual model of a city. I’m using directx9 APIs for this.
Following UpdateCamera() function is used for camera interactivicty. I want my camera to move along the ground. My problem is that the camera moves at the same level irrespective of the ground.
Hi,
why don't you just get the height of your ground below the camera and update the position of the camera accordingly? Or am I missing something?
kp
why don't you just get the height of your ground below the camera and update the position of the camera accordingly? Or am I missing something?
kp
Author
how i should compute the height of terrian?
if( m_vPosition.y < 1.0f ) m_vPosition.y = m_vPosition.y+heightmap;[/cource]what should be heightmap
u can use the mesh.intersect(...) and give it the down direction and position and then u can know how much is the hieght of the camera and act acoording to it
good luck
good luck
This topic is closed to new replies.
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