void Camera::Frustum::CalculateFrustum(){
D3DXMATRIX proj; // This will hold our projection matrix
D3DXMATRIX view; // This will hold our view matrix
D3DXMATRIX clip; // This will hold the clipping planes
g_pD3DDevice->GetTransform(D3DTS_PROJECTION, &proj);
g_pD3DDevice->GetTransform(D3DTS_VIEW, &view);
D3DXMatrixMultiply(&clip, &view, &proj);
// This will extract the RIGHT side of the frustum
m_Frustum.a = clip._14 - clip._11;
m_Frustum.b = clip._24 - clip._21;
m_Frustum.c = clip._34 - clip._31;
m_Frustum.d = clip._44 - clip._41;
// Normalize the RIGHT side
D3DXPlaneNormalize(&m_Frustum, &m_Frustum);
// This will extract the LEFT side of the frustum
m_Frustum.a = clip._14 + clip._11;
m_Frustum.b = clip._24 + clip._21;
m_Frustum.c = clip._34 + clip._31;
m_Frustum.d = clip._44 + clip._41;
// Normalize the LEFT side
D3DXPlaneNormalize(&m_Frustum, &m_Frustum);
// This will extract the BOTTOM side of the frustum
m_Frustum[BOTTOM].a = clip._14 + clip._12;
m_Frustum[BOTTOM].b = clip._24 + clip._22;
m_Frustum[BOTTOM].c = clip._34 + clip._32;
m_Frustum[BOTTOM].d = clip._44 + clip._43;
// Normalize the BOTTOM side
D3DXPlaneNormalize(&m_Frustum[BOTTOM], &m_Frustum[BOTTOM]);
// This will extract the TOP side of the frustum
m_Frustum[TOP].a = clip._14 - clip._12;
m_Frustum[TOP].b = clip._24 - clip._22;
m_Frustum[TOP].c = clip._34 - clip._32;
m_Frustum[TOP].d = clip._44 - clip._43;
// Normalize the TOP side
D3DXPlaneNormalize(&m_Frustum[TOP], &m_Frustum[TOP]);
// This will extract the BACK side of the frustum
m_Frustum[BACK].a = clip._14 - clip._13;
m_Frustum[BACK].b = clip._24 - clip._23;
m_Frustum[BACK].c = clip._34 - clip._33;
m_Frustum[BACK].d = clip._44 - clip._43;
// Normalize the BACK side
D3DXPlaneNormalize(&m_Frustum[BACK], &m_Frustum[BACK]);
// This will extract the FRONT side of the frustum
m_Frustum[FRONT].a = clip._14 + clip._13;
m_Frustum[FRONT].b = clip._24 + clip._23;
m_Frustum[FRONT].c = clip._34 + clip._33;
m_Frustum[FRONT].d = clip._44 + clip._43;
// Normalize the FRONT side
D3DXPlaneNormalize(&m_Frustum[FRONT], &m_Frustum[FRONT]);
}
bool CFrustum::BoxInFrustum( float x, float y, float z, float x2, float y2, float z2)
{
// Go through all of the corners of the box and check then again each plane
// in the frustum. If all of them are behind one of the planes, then it most
// like is not in the frustum.
for(int i = 0; i < 6; i++ )
{
if(m_Frustum[A] * x + m_Frustum * y + m_Frustum[C] * z + m_Frustum[D] > 0) continue;
if(m_Frustum[A] * x2 + m_Frustum * y + m_Frustum[C] * z + m_Frustum[D] > 0) continue;
if(m_Frustum[A] * x + m_Frustum * y2 + m_Frustum[C] * z + m_Frustum[D] > 0) continue;
if(m_Frustum[A] * x2 + m_Frustum * y2 + m_Frustum[C] * z + m_Frustum[D] > 0) continue;
if(m_Frustum[A] * x + m_Frustum * y + m_Frustum[C] * z2 + m_Frustum[D] > 0) continue;
if(m_Frustum[A] * x2 + m_Frustum * y + m_Frustum[C] * z2 + m_Frustum[D] > 0) continue;
if(m_Frustum[A] * x + m_Frustum * y2 + m_Frustum[C] * z2 + m_Frustum[D] > 0) continue;
if(m_Frustum[A] * x2 + m_Frustum * y2 + m_Frustum[C] * z2 + m_Frustum[D] > 0) continue;
// If we get here, it isn't in the frustum
return false;
}
// Return a true for the box being inside of the frustum
return true;
}
directx program crashing
Author
I have been working on loading bsp levels in with directx in my current project and I've had a few problems.
First, does directx crash when you feed it too much data. For example, when I comment out my frustum culling code just to check if the level will render, the program crashes. If I only render a small percentage of the leaves then it doesn't crash, or if it is a small level.
Second: The reason I've had this trouble in the first place is because I can't get my frustum culling code to work. I am loading quake 3 .bsp files. I cull away clusters fine, but the problem comes when checking if a box is in my frustum. I've been checking over my frustum calculation code and my box in frustum function and I am just stuck and feel like giving up. I will list my code for those two functions if anyone thinks they can help.
D3D will not crash if fed too much data, it will just run slowly. The most common cause in cases like this is sending bad index data.
Have you read the Forum FAQ on how to debug D3D? If not, you should.
Have you read the Forum FAQ on how to debug D3D? If not, you should.
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement