make window resizable

include/config.hpp

@@ -3,13 +3,17 @@
 
 #include <raylib.h>
 
+#define VERLET_UPDATE
+// #define WEB
+
 // Window
-constexpr int WIDTH = 1300;
+constexpr int INITIAL_WIDTH = 800;
-constexpr int HEIGHT = 1100;
+constexpr int INITIAL_HEIGHT = 800;
 constexpr int MENU_HEIGHT = 200;
 
 // Menu
-constexpr int MENU_PAD = 10;
+constexpr int MENU_PAD = 5;
+constexpr int BUTTON_PAD = 20;
 constexpr int MENU_ROWS = 3;
 constexpr int MENU_COLS = 3;
 

include/renderer.hpp

@@ -58,9 +58,11 @@ public:
   Renderer()
       : camera(OrbitCamera3D(Vector3(0, 0, 0), CAMERA_DISTANCE)),
         mark_solutions(false), connect_solutions(false) {
-    render_target = LoadRenderTexture(WIDTH, HEIGHT);
+    render_target = LoadRenderTexture(GetScreenWidth() / 2.0,
-    klotski_target = LoadRenderTexture(WIDTH, HEIGHT);
+                                      GetScreenHeight() - MENU_HEIGHT);
-    menu_target = LoadRenderTexture(WIDTH * 2, MENU_HEIGHT);
+    klotski_target = LoadRenderTexture(GetScreenWidth() / 2.0,
+                                       GetScreenHeight() - MENU_HEIGHT);
+    menu_target = LoadRenderTexture(GetScreenWidth(), MENU_HEIGHT);
   }
 
   Renderer(const Renderer &copy) = delete;
@@ -84,6 +86,8 @@ public:
   auto UpdateCamera(const MassSpringSystem &masssprings, const State &current)
       -> void;
 
+  auto UpdateTextureSizes() -> void;
+
   auto DrawMassSprings(const MassSpringSystem &masssprings,
                        const State &current) -> void;
 

src/main.cpp

@@ -1,8 +1,5 @@
-#define VERLET_UPDATE
-
 #include <chrono>
 #include <iostream>
-#include <omp.h>
 #include <ratio>
 #include <raylib.h>
 #include <raymath.h>
@@ -13,6 +10,9 @@
 #include "renderer.hpp"
 #include "states.hpp"
 
+#ifndef WEB
+#include <omp.h>
+#endif
 
 auto apply_state(MassSpringSystem &mass_springs, StateGenerator generator)
     -> State {
@@ -59,16 +59,19 @@ auto main(int argc, char *argv[]) -> int {
   //   return 1;
   // }
 
+#ifndef WEB
   std::cout << "OpenMP: " << omp_get_max_threads() << " threads." << std::endl;
+#endif
 
   SetTraceLogLevel(LOG_ERROR);
 
   // SetTargetFPS(60);
   SetConfigFlags(FLAG_VSYNC_HINT);
   SetConfigFlags(FLAG_MSAA_4X_HINT);
-  // SetConfigFlags(FLAG_WINDOW_ALWAYS_RUN);
+  SetConfigFlags(FLAG_WINDOW_RESIZABLE);
+  SetConfigFlags(FLAG_WINDOW_ALWAYS_RUN);
 
-  InitWindow(WIDTH * 2, HEIGHT + MENU_HEIGHT, "MassSprings");
+  InitWindow(INITIAL_WIDTH * 2, INITIAL_HEIGHT + MENU_HEIGHT, "MassSprings");
 
   // Rendering configuration
   Renderer renderer;
@@ -76,7 +79,7 @@ auto main(int argc, char *argv[]) -> int {
   // Klotski configuration
   int current_preset = 0;
   MassSpringSystem masssprings;
-  State board = apply_state(masssprings, generators[current_preset]);
+  State current_state = apply_state(masssprings, generators[current_preset]);
 
   // Game loop
   float frametime;
@@ -94,26 +97,28 @@ auto main(int argc, char *argv[]) -> int {
     frametime = GetFrameTime();
 
     // Mouse handling
-    float block_size;
+    const int board_width = GetScreenWidth() / 2.0 - 2 * BOARD_PADDING;
-    float x_offset = 0.0;
+    const int board_height =
-    float y_offset = 0.0;
+        GetScreenHeight() - MENU_HEIGHT - 2 * BOARD_PADDING;
-    if (board.width > board.height) {
+    int block_size = std::min(board_width / current_state.width,
-      block_size = static_cast<float>(WIDTH) / board.width;
+                              board_height / current_state.height) -
-      y_offset = (HEIGHT - block_size * board.height) / 2.0;
+                     2 * BLOCK_PADDING;
-    } else {
+    int x_offset =
-      block_size = static_cast<float>(HEIGHT) / board.height;
+        (board_width - (block_size + 2 * BLOCK_PADDING) * current_state.width) /
-      x_offset = (WIDTH - block_size * board.width) / 2.0;
+        2.0;
-    }
+    int y_offset = (board_height -
+                    (block_size + 2 * BLOCK_PADDING) * current_state.height) /
+                   2.0;
     Vector2 m = GetMousePosition();
     if (m.x < x_offset) {
       hov_x = 100;
     } else {
-      hov_x = (m.x - x_offset) / block_size;
+      hov_x = (m.x - x_offset) / (block_size + 2 * BLOCK_PADDING);
     }
     if (m.y - MENU_HEIGHT < y_offset) {
       hov_y = 100;
     } else {
-      hov_y = (m.y - MENU_HEIGHT - y_offset) / block_size;
+      hov_y = (m.y - MENU_HEIGHT - y_offset) / (block_size + 2 * BLOCK_PADDING);
     }
     if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
       sel_x = hov_x;
@@ -121,74 +126,76 @@ auto main(int argc, char *argv[]) -> int {
     }
 
     // Key handling
-    std::string previous_state = board.state;
+    std::string previous_state = current_state.state;
     if (IsKeyPressed(KEY_W)) {
-      if (board.MoveBlockAt(sel_x, sel_y, Direction::NOR)) {
+      if (current_state.MoveBlockAt(sel_x, sel_y, Direction::NOR)) {
         sel_y--;
       }
     } else if (IsKeyPressed(KEY_A)) {
-      if (board.MoveBlockAt(sel_x, sel_y, Direction::WES)) {
+      if (current_state.MoveBlockAt(sel_x, sel_y, Direction::WES)) {
         sel_x--;
       }
     } else if (IsKeyPressed(KEY_S)) {
-      if (board.MoveBlockAt(sel_x, sel_y, Direction::SOU)) {
+      if (current_state.MoveBlockAt(sel_x, sel_y, Direction::SOU)) {
         sel_y++;
       }
     } else if (IsKeyPressed(KEY_D)) {
-      if (board.MoveBlockAt(sel_x, sel_y, Direction::EAS)) {
+      if (current_state.MoveBlockAt(sel_x, sel_y, Direction::EAS)) {
         sel_x++;
       }
     } else if (IsKeyPressed(KEY_P)) {
-      std::cout << board.state << std::endl;
+      std::cout << current_state.state << std::endl;
     } else if (IsKeyPressed(KEY_N)) {
       current_preset =
           (generators.size() + current_preset - 1) % generators.size();
-      board = apply_state(masssprings, generators[current_preset]);
+      current_state = apply_state(masssprings, generators[current_preset]);
-      previous_state = board.state;
+      previous_state = current_state.state;
     } else if (IsKeyPressed(KEY_M)) {
       current_preset = (current_preset + 1) % generators.size();
-      board = apply_state(masssprings, generators[current_preset]);
+      current_state = apply_state(masssprings, generators[current_preset]);
-      previous_state = board.state;
+      previous_state = current_state.state;
     } else if (IsKeyPressed(KEY_R)) {
-      board = generators[current_preset]();
+      current_state = generators[current_preset]();
-      previous_state = board.state;
+      previous_state = current_state.state;
     } else if (IsKeyPressed(KEY_C)) {
-      solve_closure(masssprings, board);
+      solve_closure(masssprings, current_state);
       renderer.UpdateWinningStates(masssprings, win_conditions[current_preset]);
     } else if (IsKeyPressed(KEY_G)) {
       masssprings.masses.clear();
       masssprings.springs.clear();
-      masssprings.AddMass(MASS, Vector3Zero(), false, board.state);
+      masssprings.AddMass(MASS, Vector3Zero(), false, current_state.state);
-      previous_state = board.state;
+      previous_state = current_state.state;
     } else if (IsKeyPressed(KEY_I)) {
       renderer.mark_solutions = !renderer.mark_solutions;
     } else if (IsKeyPressed(KEY_O)) {
       renderer.connect_solutions = !renderer.connect_solutions;
     }
 
-    if (previous_state != board.state) {
+    if (previous_state != current_state.state) {
       masssprings.AddMass(
           MASS,
           Vector3(static_cast<float>(GetRandomValue(-1000, 1000)) / 1000.0,
                   static_cast<float>(GetRandomValue(-1000, 1000)) / 1000.0,
                   static_cast<float>(GetRandomValue(-1000, 1000)) / 1000.0),
-          false, board.state);
+          false, current_state.state);
-      masssprings.AddSpring(board.state, previous_state, SPRING_CONSTANT,
+      masssprings.AddSpring(current_state.state, previous_state,
-                            DAMPENING_CONSTANT, REST_LENGTH);
+                            SPRING_CONSTANT, DAMPENING_CONSTANT, REST_LENGTH);
-      renderer.AddWinningState(board, win_conditions[current_preset]);
+      renderer.AddWinningState(current_state, win_conditions[current_preset]);
     }
 
     // Physics update
     std::chrono::high_resolution_clock::time_point ps =
         std::chrono::high_resolution_clock::now();
-    masssprings.ClearForces();
+    for (int i = 0; i < UPDATES_PER_FRAME; ++i) {
-    masssprings.CalculateSpringForces();
+      masssprings.ClearForces();
-    masssprings.CalculateRepulsionForces();
+      masssprings.CalculateSpringForces();
+      masssprings.CalculateRepulsionForces();
 #ifdef VERLET_UPDATE
-    masssprings.VerletUpdate(frametime * SIM_SPEED);
+      masssprings.VerletUpdate(frametime / UPDATES_PER_FRAME * SIM_SPEED);
 #else
-    mass_springs.EulerUpdate(frametime * SIM_SPEED);
+      mass_springs.EulerUpdate(frametime * SIM_SPEED);
 #endif
+    }
     std::chrono::high_resolution_clock::time_point pe =
         std::chrono::high_resolution_clock::now();
     physics_time_accumulator += pe - ps;
@@ -196,9 +203,10 @@ auto main(int argc, char *argv[]) -> int {
     // Rendering
     std::chrono::high_resolution_clock::time_point rs =
         std::chrono::high_resolution_clock::now();
-    renderer.UpdateCamera(masssprings, board);
+    renderer.UpdateCamera(masssprings, current_state);
-    renderer.DrawMassSprings(masssprings, board);
+    renderer.UpdateTextureSizes();
-    renderer.DrawKlotski(board, hov_x, hov_y, sel_x, sel_y);
+    renderer.DrawMassSprings(masssprings, current_state);
+    renderer.DrawKlotski(current_state, hov_x, hov_y, sel_x, sel_y);
     renderer.DrawMenu(masssprings, current_preset);
     renderer.DrawTextures();
     std::chrono::high_resolution_clock::time_point re =

src/renderer.cpp

@@ -10,7 +10,7 @@
 
 auto OrbitCamera3D::Update(const Mass &current_mass) -> void {
   Vector2 mouse = GetMousePosition();
-  if (mouse.x >= WIDTH && mouse.y >= MENU_HEIGHT) {
+  if (mouse.x >= GetScreenWidth() / 2.0 && mouse.y >= MENU_HEIGHT) {
     if (IsMouseButtonPressed(MOUSE_RIGHT_BUTTON)) {
       dragging = true;
       last_mouse = mouse;
@@ -68,7 +68,7 @@ auto OrbitCamera3D::Update(const Mass &current_mass) -> void {
     target = current_mass.position;
   }
 
-  if (mouse.x >= WIDTH && mouse.y >= MENU_HEIGHT) {
+  if (mouse.x >= GetScreenWidth() / 2.0 && mouse.y >= MENU_HEIGHT) {
     float wheel = GetMouseWheelMove();
     if (IsKeyDown(KEY_LEFT_SHIFT)) {
       distance -= wheel * ZOOM_SPEED * ZOOM_MULTIPLIER;
@@ -114,6 +114,23 @@ auto Renderer::UpdateCamera(const MassSpringSystem &masssprings,
   camera.Update(c);
 }
 
+auto Renderer::UpdateTextureSizes() -> void {
+  if (!IsWindowResized()) {
+    return;
+  }
+
+  UnloadRenderTexture(render_target);
+  UnloadRenderTexture(klotski_target);
+  UnloadRenderTexture(menu_target);
+
+  int width = GetScreenWidth() / 2.0;
+  int height = GetScreenHeight() - MENU_HEIGHT;
+
+  render_target = LoadRenderTexture(width, height);
+  klotski_target = LoadRenderTexture(width, height);
+  menu_target = LoadRenderTexture(width * 2, MENU_HEIGHT);
+}
+
 auto Renderer::DrawMassSprings(const MassSpringSystem &masssprings,
                                const State &current) -> void {
   BeginTextureMode(render_target);
@@ -135,6 +152,7 @@ auto Renderer::DrawMassSprings(const MassSpringSystem &masssprings,
       DrawCube(mass.position, 4 * VERTEX_SIZE, 4 * VERTEX_SIZE, 4 * VERTEX_SIZE,
                RED);
     } else if (winning_states.contains(state)) {
+      // TODO: Would be better to store the winning flag in the state itself
       if (mark_solutions) {
         DrawCube(mass.position, 4 * VERTEX_SIZE, 4 * VERTEX_SIZE,
                  4 * VERTEX_SIZE, BLUE);
@@ -153,8 +171,7 @@ auto Renderer::DrawMassSprings(const MassSpringSystem &masssprings,
   // DrawSphere(camera.target, VERTEX_SIZE, ORANGE);
   EndMode3D();
 
-  DrawLine(0, 0, WIDTH, 0, BLACK);
+  DrawLine(0, 0, 0, GetScreenHeight() - MENU_HEIGHT, BLACK);
-  DrawLine(0, 0, 0, HEIGHT, BLACK);
   EndTextureMode();
 }
 
@@ -164,26 +181,18 @@ auto Renderer::DrawKlotski(const State &state, int hov_x, int hov_y, int sel_x,
   ClearBackground(RAYWHITE);
 
   // Draw Board
-  const int board_width = WIDTH - 2 * BOARD_PADDING;
+  const int board_width = GetScreenWidth() / 2 - 2 * BOARD_PADDING;
-  const int board_height = HEIGHT - 2 * BOARD_PADDING;
+  const int board_height = GetScreenHeight() - MENU_HEIGHT - 2 * BOARD_PADDING;
-  float block_size;
+  int block_size =
-  float x_offset = 0.0;
+      std::min(board_width / state.width, board_height / state.height) -
-  float y_offset = 0.0;
+      2 * BLOCK_PADDING;
-  if (state.width > state.height) {
+  int x_offset =
-    block_size =
+      (board_width - (block_size + 2 * BLOCK_PADDING) * state.width) / 2.0;
-        static_cast<float>(board_width) / state.width - 2 * BLOCK_PADDING;
+  int y_offset =
-    y_offset = (board_height - block_size * state.height -
+      (board_height - (block_size + 2 * BLOCK_PADDING) * state.height) / 2.0;
-                BLOCK_PADDING * 2 * state.height) /
-               2.0;
-  } else {
-    block_size =
-        static_cast<float>(board_height) / state.height - 2 * BLOCK_PADDING;
-    x_offset = (board_width - block_size * state.width -
-                BLOCK_PADDING * 2 * state.width) /
-               2.0;
-  }
 
-  DrawRectangle(0, 0, WIDTH, HEIGHT, RAYWHITE);
+  DrawRectangle(0, 0, GetScreenWidth() / 2, GetScreenHeight() - MENU_HEIGHT,
+                RAYWHITE);
   DrawRectangle(x_offset, y_offset,
                 board_width - 2 * x_offset + 2 * BOARD_PADDING,
                 board_height - 2 * y_offset + 2 * BOARD_PADDING,
@@ -235,8 +244,8 @@ auto Renderer::DrawKlotski(const State &state, int hov_x, int hov_y, int sel_x,
     }
   }
 
-  DrawLine(0, 0, WIDTH, 0, BLACK);
+  DrawLine(GetScreenWidth() / 2 - 1, 0, GetScreenWidth() / 2 - 1,
-  DrawLine(WIDTH - 1, 0, WIDTH - 1, HEIGHT, BLACK);
+           GetScreenHeight() - MENU_HEIGHT, BLACK);
   EndTextureMode();
 }
 
@@ -246,7 +255,7 @@ auto Renderer::DrawMenu(const MassSpringSystem &masssprings, int current_preset)
   ClearBackground(RAYWHITE);
 
   float btn_width =
-      static_cast<float>(WIDTH * 2 - (MENU_COLS * MENU_PAD + MENU_PAD)) /
+      static_cast<float>(GetScreenWidth() - (MENU_COLS * MENU_PAD + MENU_PAD)) /
       MENU_COLS;
   float btn_height =
       static_cast<float>(MENU_HEIGHT - (MENU_ROWS * MENU_PAD + MENU_PAD)) /
@@ -257,8 +266,8 @@ auto Renderer::DrawMenu(const MassSpringSystem &masssprings, int current_preset)
     int posy = MENU_PAD + y * (MENU_PAD + btn_height);
     DrawRectangle(posx, posy, btn_width, btn_height, Fade(color, 0.5));
     DrawRectangleLines(posx, posy, btn_width, btn_height, color);
-    DrawText(text.data(), posx + MENU_PAD, posy + MENU_PAD,
+    DrawText(text.data(), posx + BUTTON_PAD, posy + BUTTON_PAD,
-             btn_height - 2 * MENU_PAD, WHITE);
+             btn_height - 2 * BUTTON_PAD, WHITE);
   };
 
   draw_btn(0, 0,
@@ -286,21 +295,24 @@ auto Renderer::DrawMenu(const MassSpringSystem &masssprings, int current_preset)
   draw_btn(2, 1, std::format("Solve Board Closure (C)"), DARKPURPLE);
   draw_btn(2, 2, std::format("Clear Graph (G)"), DARKPURPLE);
 
-  // DrawLine(0, menu_height - 1, width * 2, menu_height - 1, BLACK);
+  DrawLine(0, MENU_HEIGHT - 1, GetScreenWidth(), MENU_HEIGHT - 1, BLACK);
   EndTextureMode();
 }
 
 auto Renderer::DrawTextures() -> void {
   BeginDrawing();
   DrawTextureRec(menu_target.texture,
-                 Rectangle(0, 0, (float)(WIDTH * 2), -(float)MENU_HEIGHT),
+                 Rectangle(0, 0, menu_target.texture.width,
+                           -1 * menu_target.texture.height),
                  Vector2(0, 0), WHITE);
   DrawTextureRec(klotski_target.texture,
-                 Rectangle(0, 0, (float)WIDTH, -(float)HEIGHT),
+                 Rectangle(0, 0, klotski_target.texture.width,
+                           -1 * klotski_target.texture.height),
                  Vector2(0, MENU_HEIGHT), WHITE);
   DrawTextureRec(render_target.texture,
-                 Rectangle(0, 0, (float)WIDTH, -(float)HEIGHT),
+                 Rectangle(0, 0, render_target.texture.width,
-                 Vector2(WIDTH, MENU_HEIGHT), WHITE);
+                           -1 * render_target.texture.height),
-  DrawFPS(WIDTH + 10, MENU_HEIGHT + 10);
+                 Vector2(GetScreenWidth() / 2.0, MENU_HEIGHT), WHITE);
+  DrawFPS(GetScreenWidth() / 2 + 10, MENU_HEIGHT + 10);
   EndDrawing();
 }