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170 lines
3.1 KiB
C
170 lines
3.1 KiB
C
#pragma once
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#define MAX_PLAYERS 4
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#define BOX_SIZE 0.5f
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#define MAX_BOXES 128
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#define BOX_MASS 1.0f
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// @Robust remove this include somehow, needed for sqrt and cos
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#include <math.h>
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// including headers from headers bad
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#ifndef SOKOL_GP_INCLUDED
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typedef struct sgp_vec2
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{
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float x, y;
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} sgp_vec2;
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typedef sgp_vec2 sgp_point;
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#endif
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#ifndef CHIPMUNK_H
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typedef void cpSpace;
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typedef void cpBody;
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typedef void cpShape;
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extern void cpShapeFree(cpShape *);
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extern void cpBodyFree(cpBody *);
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extern void cpSpaceFree(cpSpace *);
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#endif
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#include <stdbool.h>
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#ifndef _STDBOOL
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#define bool _Bool
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#define false 0
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#define true 1
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#endif
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typedef sgp_vec2 V2;
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typedef sgp_point P2;
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#define Log(...) \
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fprintf(stdout, "%s:%d | ", __FILE__, __LINE__); \
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fprintf(stdout, __VA_ARGS__)
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struct Box
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{
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cpBody *body;
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cpShape *shape;
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};
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// gotta update the serialization functions when this changes
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struct GameState
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{
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cpSpace *space;
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struct Player
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{
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struct Box box;
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bool connected;
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V2 input;
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} players[MAX_PLAYERS];
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int num_boxes;
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struct Box boxes[MAX_BOXES];
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};
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struct ServerToClient
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{
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struct GameState *cur_gs;
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int your_player;
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};
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struct ClientToServer
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{
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V2 input;
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};
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// server
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void server(void *data);
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// gamestate
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void initialize(struct GameState *gs); // must do this to place boxes into it and process
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void destroy(struct GameState *gs);
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void process(struct GameState *gs, float dt); // does in place
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void into_bytes(struct ServerToClient *gs, char *out_bytes, int *out_len, int max_len);
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void from_bytes(struct ServerToClient *gs, char *bytes, int max_len);
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// box
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struct Box box_new(struct GameState *gs, V2 pos);
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void box_destroy(struct Box * box);
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V2 box_pos(struct Box box);
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V2 box_vel(struct Box box);
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float box_rotation(struct Box box);
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float box_angular_velocity(struct Box box);
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// debug draw
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void dbg_drawall();
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void dbg_line(V2 from, V2 to);
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void dbg_rect(V2 center);
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// all the math is static so that it can be defined in each compilation unit its included in
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#define PI 3.14159f
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static V2 V2add(V2 a, V2 b)
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{
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return (V2){
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.x = a.x + b.x,
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.y = a.y + b.y,
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};
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}
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static V2 V2scale(V2 a, float f)
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{
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return (V2){
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.x = a.x * f,
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.y = a.y * f,
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};
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}
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static float V2length(V2 v)
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{
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return sqrtf(v.x * v.x + v.y * v.y);
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}
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static V2 V2normalize(V2 v)
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{
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return V2scale(v, 1.0f / V2length(v));
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}
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static float V2dot(V2 a, V2 b)
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{
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return a.x * b.x + a.y * b.y;
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}
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static float V2projectvalue(V2 vec, V2 onto)
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{
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float length_onto = V2length(onto);
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return V2dot(vec, onto) / (length_onto * length_onto);
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}
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static V2 V2project(V2 vec, V2 onto)
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{
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return V2scale(onto, V2projectvalue(vec, onto));
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}
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static V2 V2rotate(V2 vec, float theta)
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{
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return (V2){
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.x = vec.x * cos(theta) - vec.y * sin(theta),
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.y = vec.x * sin(theta) + vec.y * cos(theta),
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};
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}
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// also known as atan2
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static float V2angle(V2 vec)
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{
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return atan2f(vec.y, vec.x);
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}
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static V2 V2sub(V2 a, V2 b)
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{
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return (V2){
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.x = a.x - b.x,
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.y = a.y - b.y,
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};
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} |