63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
#include "modules/physics.h"
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#include "world/world.h"
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#include "zpl.h"
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#define PHY_WALK_DRAG 0.12
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void MoveWalk(ecs_iter_t *it) {
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Position *p = ecs_column(it, Position, 1);
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Velocity *v = ecs_column(it, Velocity, 2);
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for (int i = 0; i < it->count; i++) {
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p[i].x += v[i].x * it->delta_time;
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p[i].y += v[i].y * it->delta_time;
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v[i].x = zpl_lerp(v[i].x, 0.0f, PHY_WALK_DRAG);
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v[i].y = zpl_lerp(v[i].y, 0.0f, PHY_WALK_DRAG);
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}
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}
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void HandleCollisions(ecs_iter_t *it) {
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Position *p = ecs_column(it, Position, 1);
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Velocity *v = ecs_column(it, Velocity, 2);
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for (int i = 0; i < it->count; i++) {
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// NOTE(zaklaus): world bounds
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{
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double w = (double)world_dim();
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p[i].x = zpl_clamp(p[i].x, 0, w-1);
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p[i].y = zpl_clamp(p[i].y, 0, w-1);
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}
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}
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}
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void UpdateTrackerPos(ecs_iter_t *it) {
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Position *p = ecs_column(it, Position, 1);
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for (int i = 0; i < it->count; i++){
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librg_entity_chunk_set(world_tracker(), it->entities[i], librg_chunk_from_realpos(world_tracker(), p[i].x, p[i].y, 0));
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}
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}
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void PhysicsImport(ecs_world_t *ecs) {
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ECS_MODULE(ecs, Physics);
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ecs_set_name_prefix(ecs, "Physics");
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ECS_TAG(ecs, Walking);
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ECS_TAG(ecs, Flying);
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ECS_TYPE(ecs, Movement, Walking, Flying);
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ECS_META(ecs, Velocity);
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ECS_SYSTEM(ecs, MoveWalk, EcsOnUpdate, general.Position, Velocity);
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ECS_SYSTEM(ecs, HandleCollisions, EcsOnValidate, general.Position, Velocity);
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ECS_SYSTEM(ecs, UpdateTrackerPos, EcsPostUpdate, general.Position);
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ECS_SET_TYPE(Movement);
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ECS_SET_ENTITY(Walking);
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ECS_SET_ENTITY(Flying);
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ECS_SET_COMPONENT(Velocity);
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ECS_SET_ENTITY(MoveWalk);
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ECS_SET_ENTITY(UpdateTrackerPos);
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ECS_SET_ENTITY(HandleCollisions);
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}
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