Create ScreenCircleTransitionCLEAN.c

effects/ScreenCircleTransitionCLEAN.c

@@ -0,0 +1,103 @@
+//
+// Circle screen transition effect (CLEAN)
+//
+// Draw a circle on the screen but draw from the edges of this circle
+// to the edges of the screen.
+//
+//
+
+#include "raylib.h"
+
+void circletransition(int r, int screenWidth, int screenHeight, Color col);
+
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib example.");
+ 
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    int radius = 0;
+    int state = 0;
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        
+        if(state==0 && radius<screenWidth/1.5){
+            radius+=10;
+        }else{
+            state = 1;
+        }
+        if(state==1 && radius>0){
+            radius-=10;
+        }else{
+            state = 0;
+        }
+        
+        
+        //----------------------------------------------------------------------------------
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+            
+            
+            for(int y=0;y<screenHeight;y+=30){
+            for(int x=0;x<screenWidth;x+=250){
+                DrawText("Hello this is a fade..",x,y,25,BLACK);
+            }}
+            
+            circletransition(radius,screenWidth,screenHeight,BLACK);
+            
+            
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+
+
+}
+
+// 
+// Our circle transition effect.
+//
+void circletransition(int radius, int screenWidth, int screenHeight, Color col) { 
+    int xc = screenWidth/2;
+    int yc = screenHeight/2;
+    // Draw the line above and below the circle...
+    for(int a=0;a<yc-radius;a++){
+        DrawLine(0,a,screenWidth,a,BLACK);
+    }
+    for(int a=yc+radius;a<=screenHeight;a++){
+        DrawLine(0,a,screenWidth,a,BLACK);
+    }
+    // Draw from the edges of the circle to the edges of the screen.
+    int largestX = radius;
+    for (int y = 0; y <= radius; ++y) {
+        for (int x = largestX; x >= 0; --x) {
+            if ((x * x) + (y * y) <= (radius * radius)) {
+                DrawLine(0,yc-y,xc-x,yc-y,col);
+                DrawLine(0,yc+y,xc-x,yc+y,col);
+                DrawLine(xc+x,yc-y,screenWidth,yc-y,col);
+                DrawLine(xc+x,yc+y,screenWidth,yc+y,col);
+                largestX = x;
+                break; // go to next y coordinate
+            }
+        }
+    }
+}