Particle system is finished.
This commit is contained in:
363
pingpong.c
363
pingpong.c
@@ -12,6 +12,76 @@
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#define FPS 120
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#define TARGET_FRAME_TIME (1000 / FPS)
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typedef struct {
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float x;
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float y;
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} xy_point;
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typedef struct {
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unsigned int r;
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unsigned int g;
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unsigned int b;
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} rgb;
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typedef struct {
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float w;
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float h;
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} rect;
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typedef struct {
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xy_point point;
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xy_point velocity;
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rect dimension;
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rgb color;
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int alpha;
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} particle;
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struct node {
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struct node *next;
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particle data;
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};
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typedef struct {
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struct node *first;
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struct node *last;
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} queue;
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void qinit(queue *item)
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{
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item->first = NULL;
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item->last = NULL;
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}
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void qput(queue *item, particle data)
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{
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if(!item->first) {
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item->first = malloc(sizeof(struct node));
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item->last = item->first;
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} else {
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item->last->next = malloc(sizeof(struct node));
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item->last = item->last->next;
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}
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item->last->data = data;
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item->last->next = NULL;
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}
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void qget(queue *item, particle *data)
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{
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if(data)
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*data = item->first->data;
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struct node *tmp = item->first;
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item->first = item->first->next;
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if(!item->first)
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item->last = NULL;
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free(tmp);
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}
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int qempty(queue *item)
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{
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return !item->first;
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}
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typedef struct {
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int is_running;
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int last_frame_time;
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@@ -35,188 +105,10 @@ typedef struct {
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int up;
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int down;
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} player_one, player_two;
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queue particle_queue;
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} game_state;
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/* --------------------------------------------------------------------- */
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typedef struct {
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float x;
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float y;
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float vel_x;
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float vel_y;
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float w;
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float h;
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float alpha;
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} particle;
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particle particles[] = {
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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};
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#define PARTICLE_COUNT sizeof(particles) / sizeof(particle)
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/* --------------------------------------------------------------------- */
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void exit_error(const char *error)
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{
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fprintf(stderr, "%s\n", error);
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@@ -255,6 +147,13 @@ void initialized_font(TTF_Font **font)
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exit_error("Error opening font.");
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}
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void emit_particle(game_state *state, xy_point point, xy_point velocity,
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rect dimension, rgb color, int alpha)
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{
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particle p = {point, velocity, dimension, color, alpha};
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qput(&state->particle_queue, p);
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}
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void handle_ball(game_state *state, float delta_time)
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{
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if(state->ball.x < state->player_one.x + state->player_one.width &&
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@@ -264,15 +163,14 @@ void handle_ball(game_state *state, float delta_time)
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state->ball.x = state->player_one.x + state->player_one.width;
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state->ball.acceleration_x *= -1;
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/* TODO: Add particles. */
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int i;
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for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
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particles[i].vel_x = rand() % 61 + 60;
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particles[i].vel_y = rand() % 121 - 60;
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particles[i].x = state->ball.x;
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particles[i].y = state->ball.y;
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particles[i].alpha = 255.0f;
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for(i = 0; i < 50; i++) {
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xy_point point = {state->ball.x + state->ball.width, state->ball.y};
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xy_point velocity = {rand() % 81 + 80, rand() % 161 - 80};
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rgb color = {215, 78, 66};
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float width = (float)(rand() % 4 + 1);
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rect dimension = {width, width};
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emit_particle(state, point, velocity, dimension, color, 255);
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}
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}
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@@ -283,15 +181,14 @@ void handle_ball(game_state *state, float delta_time)
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state->ball.x = state->player_two.x - state->ball.width;
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state->ball.acceleration_x *= -1;
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/* TODO: Add particles. */
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int i;
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for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
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particles[i].vel_x = -(rand() % 61 + 60);
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particles[i].vel_y = rand() % 81 - 40;
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particles[i].x = state->ball.x + state->ball.width;
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particles[i].y = state->ball.y;
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particles[i].alpha = 255.0f;
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for(i = 0; i < 50; i++) {
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xy_point point = {state->ball.x, state->ball.y};
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xy_point velocity = {-(rand() % 81 + 80), rand() % 161 - 80};
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rgb color = {16, 133, 255};
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float width = (float)(rand() % 4 + 1);
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rect dimension = {width, width};
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emit_particle(state, point, velocity, dimension, color, 255);
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}
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}
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@@ -339,9 +236,28 @@ void handle_paddles(game_state *state, float delta_time)
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state->player_two.y += state->player_one.acceleration_y * delta_time;
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}
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void handle_particles(game_state *state, float delta_time)
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{
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if(!qempty(&state->particle_queue)) {
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struct node *tmp = state->particle_queue.first;
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while(tmp) {
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tmp->data.alpha -= 2; /* TODO: Lock to delta time. */
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if(tmp->data.alpha < 0.0f) {
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tmp = tmp->next;
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qget(&state->particle_queue, NULL);
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continue;
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}
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tmp->data.point.x += tmp->data.velocity.x * delta_time;
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tmp->data.point.y += tmp->data.velocity.y * delta_time;
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tmp = tmp->next;
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}
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}
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}
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void render_score(game_state *state, SDL_Renderer *renderer, TTF_Font *font)
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{
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/* Build score strings */
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/* Build score string */
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char *score;
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score = malloc(3*sizeof(char));
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score[0] = (char)(state->player_one.score + 48); /* FIX */
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@@ -388,16 +304,34 @@ void render_paddles(game_state *state, SDL_Renderer *renderer)
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SDL_RenderFillRect(renderer, &player_two_rect);
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}
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void render_particles(game_state *state, SDL_Renderer *renderer)
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{
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if(!qempty(&state->particle_queue)) {
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SDL_Rect particle_rect;
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struct node *tmp = state->particle_queue.first;
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while(tmp) {
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particle_rect.x = tmp->data.point.x;
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particle_rect.y = tmp->data.point.y;
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particle_rect.w = tmp->data.dimension.w;
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particle_rect.h = tmp->data.dimension.h;
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SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
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SDL_SetRenderDrawColor(renderer,
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tmp->data.color.r, tmp->data.color.g,
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tmp->data.color.b, tmp->data.alpha);
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SDL_RenderFillRect(renderer, &particle_rect);
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tmp = tmp->next;
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}
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}
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}
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void setup(game_state *state)
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{
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state->is_running = TRUE;
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state->last_frame_time = 0;
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int i;
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for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
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particles[i].w = rand() % 3 + 1;
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particles[i].y = particles[i].w;
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}
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qinit(&state->particle_queue);
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state->ball.x = 40;
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state->ball.y = 40;
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@@ -472,7 +406,6 @@ void update(game_state *state)
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{
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int time_to_wait;
|
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float delta_time;
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int i;
|
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|
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time_to_wait = TARGET_FRAME_TIME - (SDL_GetTicks() - state->last_frame_time);
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|
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@@ -485,15 +418,7 @@ void update(game_state *state)
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|
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handle_ball(state, delta_time);
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handle_paddles(state, delta_time);
|
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for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
|
||||
particles[i].alpha -= 2.0f;
|
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if(particles[i].alpha < 0.0f)
|
||||
particles[i].alpha = 0.0f;
|
||||
|
||||
particles[i].x += particles[i].vel_x * delta_time;
|
||||
particles[i].y += particles[i].vel_y * delta_time;
|
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}
|
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handle_particles(state, delta_time);
|
||||
}
|
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|
||||
void render(game_state *state, SDL_Renderer *renderer, TTF_Font *font)
|
||||
@@ -504,19 +429,7 @@ void render(game_state *state, SDL_Renderer *renderer, TTF_Font *font)
|
||||
render_paddles(state, renderer);
|
||||
render_ball(state, renderer);
|
||||
render_score(state, renderer, font);
|
||||
|
||||
SDL_Rect particle_rect;
|
||||
int i;
|
||||
for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
|
||||
particle_rect.x = particles[i].x;
|
||||
particle_rect.y = particles[i].y;
|
||||
particle_rect.w = particles[i].w;
|
||||
particle_rect.h = particles[i].h;
|
||||
|
||||
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
|
||||
SDL_SetRenderDrawColor(renderer, 198, 204, 215, (int)particles[i].alpha);
|
||||
SDL_RenderFillRect(renderer, &particle_rect);
|
||||
}
|
||||
render_particles(state, renderer);
|
||||
|
||||
SDL_RenderPresent(renderer);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user