mirror of
https://gitlab.com/ryandwyer/perfect-dark
synced 2026-08-17 12:59:41 -04:00
Ryan Dwyer
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
#include <ultra64.h>
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#include "constants.h"
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#include "bss.h"
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#include "data.h"
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#include "types.h"
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void sparksTick(void)
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{
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struct sparkgroup *group;
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struct sparktype *type;
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struct spark *spark;
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s32 next;
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s32 i;
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s32 j;
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s32 k;
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if (g_SparksAreActive) {
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g_SparksAreActive = false;
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group = &g_SparkGroups[0];
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// Iterate spark groups
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for (i = 0; i != 10; i++) {
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type = &g_SparkTypes[group->type];
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if (group->age >= type->maxage) {
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group->age = 0;
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} else if (group->age) {
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if (g_SparksAreActive == false) {
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g_SparksAreActive = true;
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}
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// Iterate the lvupdate multiplier
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for (j = 0; j < g_Vars.lvupdate60; j++) {
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group->age++;
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next = group->startindex;
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spark = &g_Sparks[next];
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// Iterate sparks in this group
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for (k = 0; k < group->numsparks; k++) {
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// Update this spark if active
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if (spark->ttl) {
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spark->speed.x -= spark->speed.x * type->decel;
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spark->speed.y = (spark->speed.y - spark->speed.y * type->decel) - type->weight;
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spark->speed.z -= spark->speed.z * type->decel;
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if (spark->speed.y == 0.0f) {
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spark->speed.y = -0.0001f;
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}
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spark->pos.x += spark->speed.x;
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spark->pos.y += spark->speed.y;
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spark->pos.z += spark->speed.z;
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spark->ttl--;
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}
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// If reached the end of the array, jump back to start
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next++;
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if (next == ARRAYCOUNT(g_Sparks)) {
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// @dangerous: `next` is not reset here, so this
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// condition will only pass once per group.
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// If a group contains more than 100 sparks, it
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// could cause spark to overflow the array and write
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// over whatever's after it. This doesn't happen
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// because no group has more than 100 sparks.
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spark = &g_Sparks[0];
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} else {
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spark++;
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}
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}
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}
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}
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group++;
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}
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}
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}
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