Worms physics first commit

physics_movement.c

+/*******************************************************************************************
+*
+*   Physac - Physics movement
+*
+*   NOTE 1: Physac requires multi-threading, when InitPhysics() a second thread is created to manage physics calculations.
+*   NOTE 2: Physac requires static C library linkage to avoid dependency on MinGW DLL (-static -lpthread)
+*
+*   Use the following line to compile:
+*
+*   gcc -o $(NAME_PART).exe $(FILE_NAME) -s -static  /
+*       -lraylib -lpthread -lglfw3 -lopengl32 -lgdi32 -lopenal32 -lwinmm /
+*       -std=c99 -Wl,--subsystem,windows -Wl,-allow-multiple-definition
+*
+*   Copyright (c) 2016-2018 Victor Fisac
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define PHYSAC_IMPLEMENTATION
+#define PHYSAC_NO_THREADS
+#include "physac.h"
+
+#define VELOCITY    0.5f
+
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    SetConfigFlags(FLAG_MSAA_4X_HINT);
+    InitWindow(screenWidth, screenHeight, "Physac [raylib] - Physics movement");
+
+    // Physac logo drawing position
+    int logoX = screenWidth - MeasureText("Physac", 30) - 10;
+    int logoY = 15;
+
+    // Initialize physics and default physics bodies
+    InitPhysics();
+
+    // Create floor and walls rectangle physics body
+    PhysicsBody floor = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2, screenHeight }, screenWidth, 100, 10);
+    PhysicsBody platformLeft = CreatePhysicsBodyRectangle((Vector2){ screenWidth*0.25f, screenHeight*0.6f }, screenWidth*0.25f, 10, 10);
+    PhysicsBody platformRight = CreatePhysicsBodyRectangle((Vector2){ screenWidth*0.75f, screenHeight*0.6f }, screenWidth*0.25f, 10, 10);
+    PhysicsBody wallLeft = CreatePhysicsBodyRectangle((Vector2){ -5, screenHeight/2 }, 10, screenHeight, 10);
+    PhysicsBody wallRight = CreatePhysicsBodyRectangle((Vector2){ screenWidth + 5, screenHeight/2 }, 10, screenHeight, 10);
+
+    // Disable dynamics to floor and walls physics bodies
+    floor->enabled = false;
+    platformLeft->enabled = false;
+    platformRight->enabled = false;
+    wallLeft->enabled = false;
+    wallRight->enabled = false;
+
+    // Create movement physics body
+    PhysicsBody body = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2, screenHeight/2 }, 50, 50, 1);
+    body->freezeOrient = true;      // Constrain body rotation to avoid little collision torque amounts
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        RunPhysicsStep();
+
+        if (IsKeyPressed('R'))    // Reset physics input
+        {
+            // Reset movement physics body position, velocity and rotation
+            body->position = (Vector2){ screenWidth/2, screenHeight/2 };
+            body->velocity = (Vector2){ 0, 0 };
+            SetPhysicsBodyRotation(body, 0);
+        }
+
+        // Horizontal movement input
+        if (IsKeyDown(KEY_RIGHT)) body->velocity.x = VELOCITY;
+        else if (IsKeyDown(KEY_LEFT)) body->velocity.x = -VELOCITY;
+
+        // Vertical movement input checking if player physics body is grounded
+        if (IsKeyDown(KEY_UP) && body->isGrounded) body->velocity.y = -VELOCITY*4;
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(BLACK);
+
+            DrawFPS(screenWidth - 90, screenHeight - 30);
+
+            // Draw created physics bodies
+            int bodiesCount = GetPhysicsBodiesCount();
+            for (int i = 0; i < bodiesCount; i++)
+            {
+                PhysicsBody body = GetPhysicsBody(i);
+
+                int vertexCount = GetPhysicsShapeVerticesCount(i);
+                for (int j = 0; j < vertexCount; j++)
+                {
+                    // Get physics bodies shape vertices to draw lines
+                    // Note: GetPhysicsShapeVertex() already calculates rotation transformations
+                    Vector2 vertexA = GetPhysicsShapeVertex(body, j);
+
+                    int jj = (((j + 1) < vertexCount) ? (j + 1) : 0);   // Get next vertex or first to close the shape
+                    Vector2 vertexB = GetPhysicsShapeVertex(body, jj);
+
+                    DrawLineV(vertexA, vertexB, GREEN);     // Draw a line between two vertex positions
+                }
+            }
+
+            DrawText("Use 'ARROWS' to move player", 10, 10, 10, WHITE);
+            DrawText("Press 'R' to reset example", 10, 30, 10, WHITE);
+
+            DrawText("Physac", logoX, logoY, 30, WHITE);
+            DrawText("Powered by", logoX + 50, logoY - 7, 10, WHITE);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    ClosePhysics();       // Unitialize physics
+
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}