81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
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#include "Player_Component.h"
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#include "Entity.h"
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#include "App.h"
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#include "Input.h"
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#include "util/assert.h"
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#include <stdlib.h>
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static inline double dabs(double x) {
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return x < 0.0 ? -x : x;
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}
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System_Player *player_NewSystem(App *super) {
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System_Player *sys = malloc(sizeof(System_Player));
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sys->super = super;
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return sys;
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}
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void player_DeleteSystem(System_Player *sys) {
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free(sys);
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}
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static void _player_OnHit(Entity *me, Entity *other, Vec2 triedDelta, void *data) {
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ASSERT(me->player && "_player_OnHit called with ME as non-player");
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// Moving down
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if (triedDelta.y > 0)
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me->player->onGround = true;
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}
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void player_AddEntity(System_Player *sys, Entity *e) {
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if (e->player) {
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ASSERT(!sys->player && "Two player entities are added! Did you forget to DeleteEntity for player?");
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sys->player = e->player;
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ASSERT(e->hitbox && "Player does not have Hitbox component");
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e->hitbox->onHit = &_player_OnHit;
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}
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}
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void player_DeleteEntity(System_Player *sys, uintptr_t id) {
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if (sys->player && sys->player->super->id == id)
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sys->player = NULL;
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}
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static double walkSpeed = 2.0, jumpSpeed = 5.0;
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static int airjumpCount = 1;
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void player_Advance(System_Player *sys, Duration deltaTime) {
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if (!sys->player)
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return;
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// The bulk of player logic right here
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System_Input *input = sys->super->input;
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double targetVecX = 0.0;
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// Move left/right
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if (input_IsPressed(input->keys[input_Key_Left]))
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targetVecX += -walkSpeed;
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if (input_IsPressed(input->keys[input_Key_Right]))
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targetVecX += walkSpeed;
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sys->player->super->position->velocity.x = targetVecX;
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if (sys->player->onGround)
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sys->player->jumpCount = 0;
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// Jump
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if (sys->super->input->keys[input_Key_Jump] == JustPressed) {
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if (sys->player->onGround || sys->player->jumpCount < airjumpCount)
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sys->player->super->position->velocity.x = jumpSpeed;
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if (!sys->player->onGround) // Took the second clause, airjumped
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sys->player->jumpCount++;
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}
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// Check OnGround again
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if (dabs(sys->player->super->position->velocity.y) > EPS)
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sys->player->onGround = false;
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}
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