Create Create_Rotate_ship_center.c

Space2d/Create_Rotate_ship_center.c

@@ -0,0 +1,84 @@
+
+#include "raylib.h"
+
+    
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib example.");
+
+     // Create a Image in memory
+    RenderTexture2D player = LoadRenderTexture(16, 16);
+    
+    
+    // Draw our ship..
+    BeginTextureMode(player);    
+    ClearBackground(BLANK);
+    for(int y=player.texture.height;y>0;y--){
+        BeginTextureMode(player);
+        DrawLine(0+y/2,player.texture.height-y,player.texture.width-y/2,player.texture.height-y,WHITE);
+        EndTextureMode();
+    }
+    
+ 
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Several variables we use for ship rotation speed and our current angle.
+    int shipTurnSpeed=3;
+    int shipAngle=0;
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        
+        for(int i=0;i<shipTurnSpeed;i++){
+            if(IsKeyDown(KEY_LEFT)){
+                shipAngle--;
+            }
+            if(IsKeyDown(KEY_RIGHT)){
+                shipAngle++;
+            }
+            if(shipAngle<0)shipAngle=359;
+            if(shipAngle>359)shipAngle=0;
+        }
+        //----------------------------------------------------------------------------------
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(BLACK);
+            DrawText("Use Cursor Left and Right to Rotate Ship - escape to exit.",2,2,20,DARKGRAY);
+
+            // Draw a texture from rectangle to target rectangle. Note we use the - for opengl reasons!
+            DrawTexturePro(player.texture,  (Rectangle){0,0,player.texture.width,-player.texture.height},
+                                            (Rectangle){320,200,player.texture.width,player.texture.height},
+                                            (Vector2){player.texture.width/2,player.texture.height/2},shipAngle,WHITE);            
+
+            //(Rectangle){0,0,player.texture.width,-player.texture.height} == << what part of texture to draw
+            // (Rectangle){320,200,player.texture.width,player.texture.height} == << where to draw it to on the screen
+            //(Vector2){player.texture.width/2,player.texture.height/2} == << rotation center
+            //shipAngle == << rotation in degrees
+            //
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    UnloadRenderTexture(player);    // Unload render texture
+ 
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+
+
+}