Sign in to follow this  

rendering a grid problems

This topic is 3042 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

hi guys my problem is that i have rendered a grid but it starts at the origin (0,0) and goes outwards from there. But how would i make it so that the centre of the grid is at the origin? the code i use is

for(DWORD i = 0; i < m; ++i)
	{
		float z = i;
		for(DWORD j = 0; j < n; ++j)
		{
			float x = j;

			// Graph of this function looks like a mountain range.
			float y = 0.0f;

			vertices[i*n+j].pos = D3DXVECTOR3(x, y, z);

			// Stretch texture over grid.
			vertices[i*n+j].texC.x = j*du;
			vertices[i*n+j].texC.y = i*dv;

			// n = (-df/dx, 1, -df/dz)
			D3DXVECTOR3 normal;
			normal.x = -0.03f*z*cosf(0.1f*x) - 0.3f*cosf(0.1f*z);
			normal.y = 1.0f;
			normal.z = -0.3f*sinf(0.1f*x) + 0.03f*x*sinf(0.1f*z);
			D3DXVec3Normalize(&vertices[i*n+j].normal, &normal);
		}
	}

Share this post


Link to post
Share on other sites

This topic is 3042 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this