Flickering problem with world matrix
- by gnomgrol
I do have a pretty wierd problem today.
As soon as I try to change my translation- or rotationmatrix for an object to something else than (0,0,0), the object starts to flicker (scaling works fine). It rapid and randomly switches between the spot it should be in and a crippled something.
I first thought that the problem would be z-fighting, but now Im pretty sure it isn't.
I have now clue at all what it could be, here are two screenshots of the two states the plant is switching between.
I already used PIX, but could find anything of use (Im not a very good debugger anyway)
I would appreciate any help, thanks a lot!
Important code:
D3DXMatrixIdentity(&World);
D3DXVECTOR3 rotaxisX = D3DXVECTOR3(1.0f, 0.0f, 0.0f);
D3DXVECTOR3 rotaxisY = D3DXVECTOR3(0.0f, 1.0f, 0.0f);
D3DXVECTOR3 rotaxisZ = D3DXVECTOR3(0.0f, 0.0f, 1.0f);
D3DXMATRIX temprot1, temprot2, temprot3;
D3DXMatrixRotationAxis(&temprot1, &rotaxisX, 0);
D3DXMatrixRotationAxis(&temprot2, &rotaxisY, 0);
D3DXMatrixRotationAxis(&temprot3, &rotaxisZ, 0);
Rotation = temprot1 *temprot2 * temprot3;
D3DXMatrixTranslation(&Translation, 0.0f, 10.0f, 0.0f);
D3DXMatrixScaling(&Scale, 0.02f, 0.02f, 0.02f);
//Set objs world space using the transformations
World = Translation * Rotation * Scale;
shader:
cbuffer cbPerObject
{
matrix worldMatrix;
matrix viewMatrix;
matrix projectionMatrix;
};
// Change the position vector to be 4 units for proper matrix calculations.
input.position.w = 1.0f;
// Calculate the position of the vertex against the world, view, and projection matrices.
output.position = mul(input.position, worldMatrix);
output.position = mul(output.position, viewMatrix);
output.position = mul(output.position, projectionMatrix);
