Rendering with Direct3D - Direct3D Rendering

Graphics Reference

In-Depth Information

The Filter property of the sampler state description controls which texels will be used

and how they are combined to generate the final pixel. Here, we have used Filter.

MinMagMipLinear , which provides a better quality result than the default Filter.

MinMagMipPoint value. The sampler will now use linear interpolation when minifying,

when magnifying, and for mid-level sampling. Zooming in and out will show the effect of

the filtering method used. Try changing the triangle or quad back to the default and see

the contrast in quality. Also, try doing this with other filter values.

To make the SRV and sampler state available to the pixel shader, we have bound them with

a call to PixelShader.SetShaderResource and PixelShader.SetSampler within

DoRender of each renderer. We have specified slot 0 for both of these functions which

correlate to register(t0) and register(s0) within the shader for the texture and

sampler state respectively.

Next, we have defined our new vertex buffers. These buffers are now represented by an

array of six floats for each vertex. The axis lines are sampling single texels for each line that

approximates the original colors used (red/green/blue). The triangle is sampling within the

bounds of the texture (between zero and one) to select the entire width of the texture at the

base and the top-center of the texture at the apex. The quad is addressing twice the width and

height of the texture (between zero and two) that combined with the TextureAddressMode.

Wrap value that is repeating the texture four times within the surface.

To address z-fighting/flimmering, the triangle has been brought forward

by a tiny amount. To see the effects of these depth artifacts, try setting

the z coordinate value back to zero.