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Diffstat (limited to 'examples/core/core_random_sequence.c')
| -rw-r--r-- | examples/core/core_random_sequence.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/examples/core/core_random_sequence.c b/examples/core/core_random_sequence.c new file mode 100644 index 00000000..c946b64d --- /dev/null +++ b/examples/core/core_random_sequence.c @@ -0,0 +1,176 @@ +/******************************************************************************************* +* +* raylib [core] example - Generates a random sequence +* +* Example originally created with raylib 5.0, last time updated with raylib 5.0 +* +* Example contributed by Dalton Overmyer (@REDl3east) and reviewed by Ramon Santamaria (@raysan5) +* +* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified, +* BSD-like license that allows static linking with closed source software +* +* Copyright (c) 2023 Dalton Overmyer (@REDl3east) +* +********************************************************************************************/ + +#include "raylib.h" +#include "raymath.h" + +#include <stdlib.h> // Required for: malloc() and free() + +typedef struct ColorRect{ + Color c; + Rectangle r; +} ColorRect; + +static Color GenerateRandomColor(); +static ColorRect* GenerateRandomColorRectSequence(float rectCount, float rectWidth, float screenWidth, float screenHeight); +static void ShuffleColorRectSequence(ColorRect* rectangles, int rectCount); +static void DrawTextCenterKeyHelp(const char* key, const char* text, int posX, int posY, int fontSize, Color color); + +//------------------------------------------------------------------------------------ +// Program main entry point +//------------------------------------------------------------------------------------ +int main(void) { + // Initialization + //-------------------------------------------------------------------------------------- + const int screenWidth = 800; + const int screenHeight = 450; + + InitWindow(screenWidth, screenHeight, "raylib [core] example - Generates a random sequence"); + + int rectCount = 20; + float rectSize = (float)screenWidth/rectCount; + ColorRect* rectangles = GenerateRandomColorRectSequence(rectCount, rectSize, screenWidth, 0.75f * screenHeight); + + SetTargetFPS(60); + //-------------------------------------------------------------------------------------- + + // Main game loop + while (!WindowShouldClose()) // Detect window close button or ESC key + { + // Update + //---------------------------------------------------------------------------------- + + if(IsKeyPressed(KEY_SPACE)) + { + ShuffleColorRectSequence(rectangles, rectCount); + } + + if(IsKeyPressed(KEY_UP)) + { + rectCount++; + rectSize = (float)screenWidth/rectCount; + free(rectangles); + rectangles = GenerateRandomColorRectSequence(rectCount, rectSize, screenWidth, 0.75f * screenHeight); + } + + if(IsKeyPressed(KEY_DOWN)) + { + if(rectCount >= 4){ + rectCount--; + rectSize = (float)screenWidth/rectCount; + free(rectangles); + rectangles = GenerateRandomColorRectSequence(rectCount, rectSize, screenWidth, 0.75f * screenHeight); + } + } + + // Draw + //---------------------------------------------------------------------------------- + BeginDrawing(); + + ClearBackground(RAYWHITE); + + int fontSize = 20; + for(int x=0;x<rectCount;x++) + { + DrawRectangleRec(rectangles[x].r, rectangles[x].c); + DrawTextCenterKeyHelp("SPACE", "to shuffle the sequence.", 10, screenHeight - 96, fontSize, BLACK); + DrawTextCenterKeyHelp("UP", "to add a rectangle and generate a new sequence.", 10, screenHeight - 64, fontSize, BLACK); + DrawTextCenterKeyHelp("DOWN", "to remove a rectangle and generate a new sequence.", 10, screenHeight - 32, fontSize, BLACK); + } + + const char* rectCountText = TextFormat("%d rectangles", rectCount); + int rectCountTextSize = MeasureText(rectCountText, fontSize); + DrawText(rectCountText, screenWidth - rectCountTextSize - 10, 10, fontSize, BLACK); + + DrawFPS(10, 10); + + EndDrawing(); + //---------------------------------------------------------------------------------- + } + + // De-Initialization + //-------------------------------------------------------------------------------------- + + free(rectangles); + CloseWindow(); // Close window and OpenGL context + //-------------------------------------------------------------------------------------- + + return 0; +} + +static Color GenerateRandomColor() +{ + return CLITERAL(Color){ + GetRandomValue(0, 255), + GetRandomValue(0, 255), + GetRandomValue(0, 255), + 255, + }; +} + +static ColorRect* GenerateRandomColorRectSequence(float rectCount, float rectWidth, float screenWidth, float screenHeight){ + int *seq = LoadRandomSequence(rectCount, 0, rectCount-1); + ColorRect* rectangles = (ColorRect *)malloc(rectCount*sizeof(ColorRect)); + + float rectSeqWidth = rectCount * rectWidth; + int startX = (screenWidth - rectSeqWidth) * 0.5f; + + for(int x=0;x<rectCount;x++){ + int rectHeight = Remap(seq[x], 0, rectCount-1, 0, screenHeight); + rectangles[x].c = GenerateRandomColor(); + rectangles[x].r = CLITERAL(Rectangle){ + startX + x * rectWidth, screenHeight - rectHeight, rectWidth, rectHeight + }; + } + UnloadRandomSequence(seq); + return rectangles; +} + +static void ShuffleColorRectSequence(ColorRect* rectangles, int rectCount) +{ + int *seq = LoadRandomSequence(rectCount, 0, rectCount-1); + for(int i1=0;i1<rectCount;i1++){ + ColorRect* r1 = &rectangles[i1]; + ColorRect* r2 = &rectangles[seq[i1]]; + + // swap only the color and height + ColorRect tmp = *r1; + r1->c = r2->c; + r1->r.height = r2->r.height; + r1->r.y = r2->r.y; + r2->c = tmp.c; + r2->r.height = tmp.r.height; + r2->r.y = tmp.r.y; + + } + UnloadRandomSequence(seq); +} + +static void DrawTextCenterKeyHelp(const char* key, const char* text, int posX, int posY, int fontSize, Color color) +{ + int spaceSize = MeasureText(" ", fontSize); + int pressSize = MeasureText("Press", fontSize); + int keySize = MeasureText(key, fontSize); + int textSize = MeasureText(text, fontSize); + int totalSize = pressSize + 2 * spaceSize + keySize + 2 * spaceSize + textSize; + int textSizeCurrent = 0; + + DrawText("Press", posX, posY, fontSize, color); + textSizeCurrent += pressSize + 2 * spaceSize; + DrawText(key, posX + textSizeCurrent, posY, fontSize, RED); + DrawRectangle(posX + textSizeCurrent, posY + fontSize, keySize, 3, RED); + textSizeCurrent += keySize + 2 * spaceSize; + DrawText(text, posX + textSizeCurrent, posY, fontSize, color); +}
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