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Improve and optimize parallax generation and drawing

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This commit is contained in:
Lucas S. Vieira 2024-10-27 21:06:46 -03:00
parent 09e17d3bbb
commit 774034dce6
5 changed files with 81 additions and 118 deletions
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20
include/parallax.h
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@ -20,32 +20,18 @@
height: u16
*/
// Holds a single parallax strip part.
// Parts are a horizontal slice of a single strip.
// Holds a single parallax strip for a level.
// A strip is a horizontally-repeating quad.
typedef struct {
uint8_t u0;
uint8_t v0;
uint8_t bgindex;
uint16_t width;
uint16_t height;
// Calculated on load
uint16_t offsetx;
} ParallaxPart;
// Holds a single parallax strip for a level.
// A strip may be a horizontally-repeating quad, or it
// may be composed of more than one quad that forms a bigger strip.
typedef struct {
uint8_t num_parts;
uint8_t bgindex;
uint8_t is_single;
int32_t scrollx;
int32_t speedx;
int16_t y0;
ParallaxPart *parts;
// Calculated on load
uint16_t width;
// State
int32_t rposx;