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109 lines
4.2 KiB
109 lines
4.2 KiB
/*******************************************************************************************
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*
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* raylib [shapes] example - following eyes
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*
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* Example originally created with raylib 2.5, last time updated with raylib 2.5
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*
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2013-2023 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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#include "raylib.h"
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#include <math.h> // Required for: atan2f()
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//------------------------------------------------------------------------------------
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// Program main entry point
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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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InitWindow(screenWidth, screenHeight, "raylib [shapes] example - following eyes");
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Vector2 scleraLeftPosition = { GetScreenWidth()/2.0f - 100.0f, GetScreenHeight()/2.0f };
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Vector2 scleraRightPosition = { GetScreenWidth()/2.0f + 100.0f, GetScreenHeight()/2.0f };
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float scleraRadius = 80;
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Vector2 irisLeftPosition = { GetScreenWidth()/2.0f - 100.0f, GetScreenHeight()/2.0f };
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Vector2 irisRightPosition = { GetScreenWidth()/2.0f + 100.0f, GetScreenHeight()/2.0f };
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float irisRadius = 24;
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float angle = 0.0f;
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float dx = 0.0f, dy = 0.0f, dxx = 0.0f, dyy = 0.0f;
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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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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irisLeftPosition = GetMousePosition();
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irisRightPosition = GetMousePosition();
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// Check not inside the left eye sclera
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if (!CheckCollisionPointCircle(irisLeftPosition, scleraLeftPosition, scleraRadius - 20))
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{
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dx = irisLeftPosition.x - scleraLeftPosition.x;
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dy = irisLeftPosition.y - scleraLeftPosition.y;
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angle = atan2f(dy, dx);
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dxx = (scleraRadius - irisRadius)*cosf(angle);
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dyy = (scleraRadius - irisRadius)*sinf(angle);
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irisLeftPosition.x = scleraLeftPosition.x + dxx;
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irisLeftPosition.y = scleraLeftPosition.y + dyy;
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}
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// Check not inside the right eye sclera
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if (!CheckCollisionPointCircle(irisRightPosition, scleraRightPosition, scleraRadius - 20))
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{
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dx = irisRightPosition.x - scleraRightPosition.x;
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dy = irisRightPosition.y - scleraRightPosition.y;
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angle = atan2f(dy, dx);
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dxx = (scleraRadius - irisRadius)*cosf(angle);
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dyy = (scleraRadius - irisRadius)*sinf(angle);
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irisRightPosition.x = scleraRightPosition.x + dxx;
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irisRightPosition.y = scleraRightPosition.y + dyy;
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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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ClearBackground(RAYWHITE);
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DrawCircleV(scleraLeftPosition, scleraRadius, LIGHTGRAY);
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DrawCircleV(irisLeftPosition, irisRadius, BROWN);
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DrawCircleV(irisLeftPosition, 10, BLACK);
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DrawCircleV(scleraRightPosition, scleraRadius, LIGHTGRAY);
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DrawCircleV(irisRightPosition, irisRadius, DARKGREEN);
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DrawCircleV(irisRightPosition, 10, BLACK);
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DrawFPS(10, 10);
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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}
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