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+/*******************************************************************************************
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+*
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+* raylib [textures] example - Mouse painting
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+*
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+* This example has been created using raylib 2.5 (www.raylib.com)
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+* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
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+*
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+* Copyright (c) 2019 Chris Dill (@MysteriousSpace)
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+*
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+********************************************************************************************/
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+
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+#include "raylib.h"
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+
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+#define MAX_COLORS_COUNT 21 // Number of colors available
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+
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+int main(void)
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+{
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+ // Initialization
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+ //--------------------------------------------------------------------------------------
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+ const int screenWidth = 800;
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+ const int screenHeight = 450;
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+
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+ InitWindow(screenWidth, screenHeight,
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+ "raylib [textures] example - texture painting");
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+
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+ // Different colours to choose from
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+ Color colors[MAX_COLORS_COUNT] = {
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+ DARKGRAY, MAROON, ORANGE, DARKGREEN, DARKBLUE, DARKPURPLE, DARKBROWN,
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+ GRAY, RED, GOLD, LIME, BLUE, VIOLET, BROWN,
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+ LIGHTGRAY, PINK, YELLOW, GREEN, SKYBLUE, PURPLE, BEIGE};
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+
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+ const char *colorNames[MAX_COLORS_COUNT] = {
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+ "DARKGRAY", "MAROON", "ORANGE", "DARKGREEN", "DARKBLUE", "DARKPURPLE",
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+ "DARKBROWN", "GRAY", "RED", "GOLD", "LIME", "BLUE",
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+ "VIOLET", "BROWN", "LIGHTGRAY", "PINK", "YELLOW", "GREEN",
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+ "SKYBLUE", "PURPLE", "BEIGE"};
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+
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+ int colorState = 0;
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+ int brushSize = 20;
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+
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+ // Create a RenderTexture2D to use as a canvas
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+ RenderTexture2D target = LoadRenderTexture(screenWidth, screenHeight);
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+ Color clearColor = RAYWHITE;
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+
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+ BeginTextureMode(target);
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+ ClearBackground(clearColor);
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+ EndTextureMode();
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+
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+ SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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+ //--------------------------------------------------------------------------------------
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+
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+ // Main game loop
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+ while (!WindowShouldClose()) // Detect window close button or ESC key
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+ {
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+ // Update
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+ //----------------------------------------------------------------------------------
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+ // Switch between colors
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+ if (IsKeyPressed(KEY_RIGHT))
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+ colorState++;
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+ else if (IsKeyPressed(KEY_LEFT))
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+ colorState--;
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+
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+ if (colorState >= MAX_COLORS_COUNT)
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+ colorState = 0;
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+ else if (colorState < 0)
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+ colorState = MAX_COLORS_COUNT - 1;
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+
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+ brushSize += GetMouseWheelMove() * 5;
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+ if (brushSize < 0)
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+ brushSize = 0;
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+ if (brushSize > 50)
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+ brushSize = 50;
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+
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+ Vector2 position = GetMousePosition();
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+
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+ if (IsKeyPressed(KEY_C)) {
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+ BeginTextureMode(target);
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+ ClearBackground(RAYWHITE);
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+ EndTextureMode();
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+ }
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+
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+ if (IsMouseButtonDown(MOUSE_LEFT_BUTTON)) {
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+ TraceLog(LOG_INFO, "Painting x: %f y: %f", position.x, position.y);
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+ BeginTextureMode(target);
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+ DrawCircle(position.x, position.y, brushSize, colors[colorState]);
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+ EndTextureMode();
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+ }
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+
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+ if (IsMouseButtonDown(MOUSE_RIGHT_BUTTON)) {
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+ TraceLog(LOG_INFO, "Erasing x: %f y: %f", position.x, position.y);
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+ BeginTextureMode(target);
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+ DrawCircle(position.x, position.y, brushSize, clearColor);
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+ EndTextureMode();
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+ }
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+
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+ if (IsKeyPressed(KEY_S)) {
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+ TakeScreenshot("textures_mouse_painting.png");
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+ }
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+ //----------------------------------------------------------------------------------
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+
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+ // Draw
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+ //----------------------------------------------------------------------------------
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+ BeginDrawing();
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+
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+ ClearBackground(RAYWHITE);
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+
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+ // NOTE: Render texture must be y-flipped due to default OpenGL coordinates
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+ // (left-bottom)
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+ DrawTextureRec(target.texture, (Rectangle){0, 0, target.texture.width, -target.texture.height}, (Vector2){0, 0}, WHITE);
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+
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+ // Draw 2d shapes and text over drawn texture
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+ DrawRectangle(0, 9, 380, 60, Fade(LIGHTGRAY, 0.7f));
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+
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+ DrawText("COLOR:", 10, 15, 20, BLACK);
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+ DrawText(colorNames[colorState], 130, 15, 20, RED);
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+ DrawText("< >", 340, 10, 30, DARKBLUE);
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+
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+ DrawText("Size:", 10, 40, 20, BLACK);
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+ DrawText(FormatText("%i", brushSize), 130, 40, 20, RED);
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+
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+ DrawCircle(GetMouseX(), GetMouseY(), brushSize, colors[colorState]);
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+
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+ DrawFPS(700, 15);
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+
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+ EndDrawing();
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+ //----------------------------------------------------------------------------------
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+ }
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+
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+ // De-Initialization
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+ //--------------------------------------------------------------------------------------
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+ UnloadRenderTexture(target);
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+ CloseWindow(); // Close window and OpenGL context
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+ //--------------------------------------------------------------------------------------
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+
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+ return 0;
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+}
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