Create Example_-_Rainbow_Backgrounds.c

Example_-_Rainbow_Backgrounds.c

@@ -0,0 +1,87 @@
+//
+// Rainbows (backgrounds)
+//
+
+#include "raylib.h"
+#include <math.h>
+
+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
+    //--------------------------------------------------------------------------------------
+    float debug=0;
+    Color col1 = (Color){100,0  ,200,255};
+    Color col2 = (Color){255,0  ,100,255};
+    float size=1;
+    int fresh=0;
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+
+        fresh++;
+        if(IsKeyPressed(KEY_SPACE)==true || fresh>30){
+            fresh=0;
+            col1 = (Color){GetRandomValue(0,255),GetRandomValue(0,255),GetRandomValue(0,255),255};
+            col2 = (Color){GetRandomValue(0,255),GetRandomValue(0,255),GetRandomValue(0,255),255};
+            size = GetRandomValue(1,32);
+        }
+        
+        float stepr = abs(col1.r-col2.r)/(float)(screenHeight/size);
+        float stepg = abs(col1.g-col2.g)/(float)(screenHeight/size);
+        float stepb = abs(col1.b-col2.b)/(float)(screenHeight/size);
+        if(col1.r>col2.r)stepr=-stepr;
+        if(col1.g>col2.g)stepg=-stepg;
+        if(col1.b>col2.b)stepb=-stepb;
+        
+        
+        //----------------------------------------------------------------------------------
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+            
+            Color col=col1;
+            float r=col.r;
+            float g=col.g;
+            float b=col.b;
+            int cnt=0;
+            for(int i=0;i<screenHeight;i++){
+                DrawLine(0,i,screenWidth,i,col);
+                if(cnt>=size){
+                    r+=stepr;
+                    g+=stepg;
+                    b+=stepb;
+                    col.r = r;
+                    col.g = g;
+                    col.b = b;                
+                    cnt=0;
+                }
+                cnt++;
+            }
+
+        
+            DrawText("Rainbow Backgrounds..",0,0,20,WHITE);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+
+
+}