Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
This section contains reference information for the input and output registers implemented by vertex shader version 2_0.
| Register | Name | Count | R/W | # Read ports | # Reads / inst | Dimension | RelAddr | Defaults | Requires DCL |
|---|---|---|---|---|---|---|---|---|---|
| v# | Input Register | 16 | R | 1 | Unlimited | 4 | No | See note 1 | Yes |
| r# | Temporary Register | 12 | R/W | 3 | Unlimited | 4 | No | None | No |
| c# | Constant Float Register | See note 2 | R | 1 | 2 | 4 | a0 / aL | (0, 0, 0, 0) | No |
| a0 | Address Register | 1 | R/W | 1 | 2 | 4 | No | None | No |
| b# | Constant Boolean Register | 16 | R | 1 | 1 | 1 | No | FALSE | No |
| i# | Constant Integer Register | 16 | R | 1 | 1 | 4 | No | (0, 0, 0, 0) | No |
| aL | Loop Counter Register | 1 | R | 1 | 2 | 1 | No | None | No |
Notes:
- Partial (0, 0, 0, 1) - If only a subset of channels are updated, the remaining channels will default to (0, 0, 0, 1).
- Equal to D3DCAPS9.MaxVertexShaderConst (at least 256 for vs_2_0).
| Register | Name | Count | R/W | Dimension | RelAddr | Defaults | Requires DCL |
|---|---|---|---|---|---|---|---|
| oPos | Position Register | 1 | W | 4 | No | None | No |
| oFog | Fog Register | 1 | W | 1 | No | None | No |
| oPts | Point Size Register | 1 | W | 1 | No | None | No |
| oD# | Color Register; See note 1 | 2 | W | 4 | No | None | No |
| oT# | Texture Coordinate Register | 8 | W | 4 | No | None | No |
Notes:
- oD0 is the diffuse color output; oD1 is the specular color output.