Merge branch 'main' of git.h3cx.dev:h3cx/fphysics

.clangd

@@ -0,0 +1,7 @@
+
+CompileFlags:
+  Add: [-xc, -std=c11]
+If:
+  PathMatch: [".*\\.h$"]
+CompileFlags:
+  Add: [-x, c-header]

CMakeLists.txt

@@ -1,5 +1,7 @@
 cmake_minimum_required(VERSION 3.20)
 
+set(CMAKE_C_COMPILER gcc)
+
 project(fuckedphysics
     VERSION 0.1.0
     LANGUAGES C
@@ -19,6 +21,9 @@ find_package(raylib REQUIRED)
 
 add_executable(${PROJECT_NAME}
     main.c
+    cphysics.c
+    mechanics.c
+    vec_util.c
 )
 
 target_link_libraries(${PROJECT_NAME}

main.c

@@ -1,5 +1,7 @@
 #define _POSIX_C_SOURCE 200809L
 
+#include "consts.h"
+#include "mechanics.h"
 #include <bits/time.h>
 #include <math.h>
 #include <pthread.h>
@@ -9,8 +11,6 @@
 #include <threads.h>
 #include <time.h>
 #include <unistd.h>
-#include "consts.h"
-#include "mechanics.h"
 
 int center_x_text(const char *text, int width, int size) {
   return (width - MeasureText(text, size)) / 2;
@@ -20,8 +20,6 @@ static inline int center_y_text(int height, int size) {
   return (height - size) / 2;
 }
 
-
-
 long long timespec_diff_ns(struct timespec end, struct timespec start) {
   return (end.tv_sec - start.tv_sec) * 1000000000LL +
          (end.tv_nsec - start.tv_nsec);
@@ -51,6 +49,8 @@ void *physics(void *args) {
 }
 
 int main(void) {
+  float v_scale = 1;
+  Vector2 canvas_offset = {0, 0};
   pthread_t physics_thread;
   const char *welcome_text = "Welcome to Fucked Physics!";
   universe_t universe = {0, NULL};
@@ -95,11 +95,60 @@ int main(void) {
 
   while (!WindowShouldClose()) {
 
+    int key_pressed = 0;
+    do {
+      key_pressed = GetKeyPressed();
+      switch (key_pressed) {
+      case KEY_I:
+        v_scale += 0.1;
+        break;
+      case KEY_O:
+        if (v_scale > 0.1) {
+          v_scale -= 0.1;
+        }
+        break;
+      case KEY_LEFT:
+        canvas_offset.x += 100;
+        break;
+      case KEY_RIGHT:
+        canvas_offset.x -= 100;
+        break;
+      case KEY_UP:
+        canvas_offset.y += 100;
+        break;
+      case KEY_DOWN:
+        canvas_offset.y -= 100;
+        break;
+      }
+    } while (key_pressed != 0);
+
+    if (canvas_offset.x + GetRenderWidth() * 0.5 / v_scale >
+        GetRenderWidth() * 5) {
+      canvas_offset.x =
+          -GetRenderWidth() * 0.5 / v_scale + GetRenderWidth() * 5;
+    } else if (canvas_offset.x - GetRenderWidth() * 0.5 / v_scale <
+               -GetRenderWidth() * 5) {
+      canvas_offset.x = GetRenderWidth() * 0.5 / v_scale - GetRenderWidth() * 5;
+    }
+
+    if (canvas_offset.y + GetRenderHeight() * 0.5 / v_scale >
+        GetRenderHeight() * 5) {
+      canvas_offset.y =
+          -GetRenderHeight() * 0.5 / v_scale + GetRenderHeight() * 5;
+    } else if (canvas_offset.y - GetRenderHeight() * 0.5 / v_scale <
+               -GetRenderHeight() * 5) {
+      canvas_offset.y =
+          GetRenderHeight() * 0.5 / v_scale - GetRenderHeight() * 5;
+    }
+
     BeginDrawing();
     ClearBackground(RAYWHITE);
     for (unsigned int i = 0; i < universe.num_bodies; i++) {
-      DrawCircleV(transform_to_center(universe.bodies[i].position),
-                  universe.bodies[i].radius,
+      Vector2 scaled_offset = vec2_scale(&canvas_offset, v_scale);
+      Vector2 body_position = vec2_scale(&universe.bodies[i].position, v_scale);
+      body_position = vec2_sum(&body_position, &scaled_offset);
+      DrawCircleV(transform_to_center(body_position),
+                  universe.bodies[i].radius * v_scale,
                   (Color){((256 / universe.num_bodies) * i) % 256,
                           255 * (i % 2), 255 * (i % 2) * (i % 3), 255});
     }