Clip Window Sprites Register: Difference between revisions
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added info + Core 2.00.22 changes (readable now) |
Adding details how sprite clipping works in "over border" mode. |
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| Line 12: | Line 12: | ||
The values are 0,255,0,191 after a Reset | The values are 0,255,0,191 after a Reset | ||
Clip window on Sprites works by default only when the "draw over border" is disabled. With "over border" enabled, the clip window must be enabled extra by bit 5 in {{NextRegNo|$15}}. | Clip window on Sprites works by default only when the "draw over border" is disabled. With "over border" enabled, the clip window must be enabled extra by bit 5 in {{NextRegNo|$15}}, and X-axis coordinates of clip-window are then doubled, see the {{NextRegNo|$15}} for details and example. | ||
The current read/write index (which coordinate is next) can be read or reset by {{NextRegNo|$1C}}. | |||
Revision as of 12:51, 23 December 2018
| Number | TBRegisterNumber::$19 |
|---|---|
| Readable | TBRegisterReadable::Yes |
| Writable | TBRegisterWritable::Yes |
| Short Description | ShortDesc::Sets and reads clip-window for Sprites |
- read/write: X1 position
- read/write: X2 position
- read/write: Y1 position
- read/write: Y2 position
The values are 0,255,0,191 after a Reset
Clip window on Sprites works by default only when the "draw over border" is disabled. With "over border" enabled, the clip window must be enabled extra by bit 5 in {{#ask: TBRegisterNumber::$15 }} ($15), and X-axis coordinates of clip-window are then doubled, see the {{#ask: TBRegisterNumber::$15 }} ($15) for details and example.
The current read/write index (which coordinate is next) can be read or reset by {{#ask: TBRegisterNumber::$1C }} ($1C).