Create Function_SphereBoxCollision3d.c

3D/Function_SphereBoxCollision3d.c

@@ -0,0 +1,154 @@
+#define max(x, y) (((x) > (y)) ? (x) : (y))
+#define min(x, y) (((x) < (y)) ? (x) : (y))
+
+#include "raylib.h"
+#include <stdlib.h>
+#include <math.h>
+
+bool sphereboxcollision(    float x1, float y1, float z1, float radius,
+                            float x2, float y2, float z2, float w, float h, float d);
+
+
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib example.");
+
+    // We generate a checked image for texturing
+    Image checked = GenImageChecked(2, 2, 1, 1, BLACK, DARKGRAY);
+    Texture2D texture = LoadTextureFromImage(checked);
+    UnloadImage(checked);
+
+    Model model = { 0 };
+    model = LoadModelFromMesh(GenMeshCube(1.0f, 1.0f, 1.0f));
+    
+    // Set checked texture as default diffuse component for all models material
+    model.materials[0].maps[MAP_DIFFUSE].texture = texture;
+
+    // Define the camera to look into our 3d world
+    Camera camera = { { 5.0f, 5.0f, 5.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, 45.0f, 0 };
+
+
+    SetCameraMode(camera, CAMERA_FIRST_PERSON);     // Set camera mode
+
+
+    Vector3 bulletpos;
+    bulletpos = camera.position;
+    Vector3 bulletinc;
+    bulletinc.x = 0.05;
+    bulletinc.y = 0.00;
+    bulletinc.z = 0.0;
+    
+
+    Model bullet = { 0 };
+    bullet = LoadModelFromMesh(GenMeshCube(1.0f, 1.0f, 1.0f));
+    
+    // Set checked texture as default diffuse component for all models material
+    bullet.materials[0].maps[MAP_DIFFUSE].texture = texture;
+
+ 
+    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
+        //----------------------------------------------------------------------------------
+        UpdateCamera(&camera);      // Update internal camera and our camera
+
+        // Shoot the bullet.
+        if(IsKeyDown(KEY_SPACE)){
+            bulletpos = camera.position;
+            // Get the direction of where to shoot the bullet at.
+            float x1 = camera.position.x;
+            float y1 = camera.position.y;
+            float z1 = camera.position.z;
+            float x2 = camera.target.x;
+            float y2 = camera.target.y;
+            float z2 = camera.target.z;
+            float delta_x = x2 - x1;
+            float delta_y = y2 - y1;
+            float delta_z = z2 - z1;
+            
+            float len = sqrt(delta_x*delta_x+delta_y*delta_y+delta_z*delta_z);
+            delta_x = delta_x / len;
+            delta_y = delta_y / len;            
+            delta_z = delta_z / len;          
+            bulletinc.x = delta_x;
+            bulletinc.y = delta_y;
+            bulletinc.z = delta_z;
+        }
+
+        
+        // update the bullet.
+        bulletpos.x += bulletinc.x;
+        bulletpos.y += bulletinc.y;
+        bulletpos.z += bulletinc.z;
+        //----------------------------------------------------------------------------------
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            BeginMode3D(camera);
+
+            // Draw a floor.
+            for(int x=0;x<50;x++){
+            for(int z=0;z<50;z++){
+                Vector3 position;
+                position.x = x;
+                position.y = 0;
+                position.z = z;
+                DrawModel(model, position, 1.0f, WHITE);
+            }
+            }
+
+            // Draw our bullet.
+            DrawModel(bullet, bulletpos, 1.0f, WHITE);
+
+            EndMode3D();
+            
+            DrawText("Press space and aim to shoot bullet.",100,100,30,YELLOW);
+            DrawFPS(0,0);
+            
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+   UnloadTexture(texture); // Unload texture
+
+    // Unload models data (GPU VRAM)
+    UnloadModel(model);
+    UnloadModel(bullet);
+
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+
+
+}
+
+bool sphereboxcollision(    float x1, float y1, float z1, float radius,
+                            float x2, float y2, float z2, float w, float h, float d) {
+  // get box closest point to sphere center by clamping
+  float x = max(x2, min(x1, x2+w));
+  float y = max(y2, min(y1, y2+h));
+  float z = max(z2, min(z1, z2+d));
+
+  // this is the same as isPointInsideSphere
+  float distance =      sqrt(   (x - x1) * (x - x1) +
+                                (y - y1) * (y - y1) +
+                                (z - z1) * (z - z1));
+  
+  return distance < radius;
+}