mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Matthew Stanley
32 lines
1.2 KiB
C
32 lines
1.2 KiB
C
#pragma once
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Test whether a camera-relative vector is inside a rectangular view cone.
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*
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* Arguments use semantic X,Z,Y ordering: X/Z span the ground plane and Y is
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* world vertical. Map the title's stored components to those axes before
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* calling. The camera forward vector is Q12.
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* `threshold` is the game's Q10 cosine threshold (the SLTI immediate after its
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* normalized dot product). `extent_pixels` expands only the horizontal
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* half-angle from the vanilla 160-pixel half-width; the vertical half-angle is
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* unchanged.
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*/
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int psx_ws_aspect_cone_contains(int32_t x, int32_t z, int32_t y,
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int32_t fx, int32_t fz, int32_t fy,
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uint32_t threshold, int extent_pixels);
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/* Widen a positive PSX 12-bit angular half-extent by the same horizontal
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* projection scale used by a 320-wide 4:3 viewport. `extent_pixels` is the
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* extra per-side reveal (including any configured guard). Identity is exact
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* when extent_pixels is zero. Results stay below a 90-degree half-angle. */
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uint32_t psx_ws_widen_angle_q12(uint32_t vanilla, int extent_pixels);
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#ifdef __cplusplus
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}
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#endif
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