33 lines
833 B
C
33 lines
833 B
C
#include <math.h>
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#include "move.h"
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void move_position(Move *m, float delta) {
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m->current_time += delta;
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float percentage = m->current_time / m->end_time;
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if (percentage < 0.0) percentage = 0.0;
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else if (percentage > 1.0) percentage = 1.0;
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Vector2 v;
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switch (m->curve) {
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case CURVE_LINEAR:
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v = (Vector2) {
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((m->destination.x - m->origin.x) * percentage) + m->origin.x,
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((m->destination.y - m->origin.y) * percentage) + m->origin.y
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};
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break;
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case CURVE_EASE_IN_OUT:
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percentage = -(cos(PI * percentage) - 1) / 2;
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v = (Vector2) {
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((m->destination.x - m->origin.x) * percentage) + m->origin.x,
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((m->destination.y - m->origin.y) * percentage) + m->origin.y
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};
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break;
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default:
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v = m->destination;
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break;
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}
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m->position->x = v.x;
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m->position->y = v.y;
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}
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