65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
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#include "pxl8_lights.h"
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#include "pxl8_mem.h"
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#include <stdlib.h>
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struct pxl8_lights {
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pxl8_light* data;
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u32 capacity;
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u32 count;
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};
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pxl8_lights* pxl8_lights_create(u32 capacity) {
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if (capacity > PXL8_LIGHTS_MAX) capacity = PXL8_LIGHTS_MAX;
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pxl8_lights* lights = pxl8_calloc(1, sizeof(pxl8_lights));
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if (!lights) return NULL;
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lights->data = pxl8_calloc(capacity, sizeof(pxl8_light));
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if (!lights->data) {
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pxl8_free(lights);
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return NULL;
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}
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lights->capacity = capacity;
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lights->count = 0;
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return lights;
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}
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void pxl8_lights_destroy(pxl8_lights* lights) {
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if (!lights) return;
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pxl8_free(lights->data);
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pxl8_free(lights);
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}
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void pxl8_lights_add(pxl8_lights* lights, f32 x, f32 y, f32 z, u8 r, u8 g, u8 b, u8 intensity, f32 radius) {
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if (!lights || lights->count >= lights->capacity) return;
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f32 radius_sq = radius * radius;
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pxl8_light* l = &lights->data[lights->count++];
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l->position.x = x;
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l->position.y = y;
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l->position.z = z;
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l->r = r;
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l->g = g;
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l->b = b;
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l->intensity = intensity;
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l->radius = radius;
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l->radius_sq = radius_sq;
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l->inv_radius_sq = radius_sq > 0.0f ? 1.0f / radius_sq : 0.0f;
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}
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void pxl8_lights_clear(pxl8_lights* lights) {
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if (!lights) return;
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lights->count = 0;
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}
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u32 pxl8_lights_count(const pxl8_lights* lights) {
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return lights ? lights->count : 0;
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}
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const pxl8_light* pxl8_lights_data(const pxl8_lights* lights) {
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return lights ? lights->data : NULL;
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}
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