/* Coding Quickie: Isometric Tiles "Owww... My insides hurt :(" - javidx9 License (OLC-3) ~~~~~~~~~~~~~~~ Copyright 2018-2019 OneLoneCoder.com Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions or derivations of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions or derivative works in binary form must reproduce the above copyright notice. This list of conditions and the following disclaimer must be reproduced in the documentation and/or other materials provided with the distribution. 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Relevant Video: https://youtu.be/ukkbNKTgf5U Links ~~~~~ YouTube: https://www.youtube.com/javidx9 https://www.youtube.com/javidx9extra Discord: https://discord.gg/WhwHUMV Twitter: https://www.twitter.com/javidx9 Twitch: https://www.twitch.tv/javidx9 GitHub: https://www.github.com/onelonecoder Patreon: https://www.patreon.com/javidx9 Homepage: https://www.onelonecoder.com Author ~~~~~~ David Barr, aka javidx9, ŠOneLoneCoder 2019 */ #define OLC_PGE_APPLICATION #include "olcPixelGameEngine.h" // Override base class with your custom functionality class IsometricDemo : public olc::PixelGameEngine { public: IsometricDemo() { sAppName = "Coding Quickie: Isometric Tiles"; } private: // Number of tiles in world olc::vi2d vWorldSize = { 14, 10 }; // Size of single tile graphic olc::vi2d vTileSize = { 40, 20 }; // Where to place tile (0,0) on screen (in tile size steps) olc::vi2d vOrigin = { 5, 1 }; // Sprite that holds all imagery olc::Sprite *sprIsom = nullptr; // Pointer to create 2D world array int *pWorld = nullptr; public: bool OnUserCreate() override { // Load sprites used in demonstration sprIsom = new olc::Sprite("isometric_demo.png"); // Create empty world pWorld = new int[vWorldSize.x * vWorldSize.y]{ 0 }; return true; } bool OnUserUpdate(float fElapsedTime) override { Clear(olc::WHITE); // Get Mouse in world olc::vi2d vMouse = { GetMouseX(), GetMouseY() }; // Work out active cell olc::vi2d vCell = { vMouse.x / vTileSize.x, vMouse.y / vTileSize.y }; // Work out mouse offset into cell olc::vi2d vOffset = { vMouse.x % vTileSize.x, vMouse.y % vTileSize.y }; // Sample into cell offset colour olc::Pixel col = sprIsom->GetPixel(3 * vTileSize.x + vOffset.x, vOffset.y); // Work out selected cell by transforming screen cell olc::vi2d vSelected = { (vCell.y - vOrigin.y) + (vCell.x - vOrigin.x), (vCell.y - vOrigin.y) - (vCell.x - vOrigin.x) }; // "Bodge" selected cell by sampling corners if (col == olc::RED) vSelected += {-1, +0}; if (col == olc::BLUE) vSelected += {+0, -1}; if (col == olc::GREEN) vSelected += {+0, +1}; if (col == olc::YELLOW) vSelected += {+1, +0}; // Handle mouse click to toggle if a tile is visible or not if (GetMouse(0).bPressed) { // Guard array boundary if (vSelected.x >= 0 && vSelected.x < vWorldSize.x && vSelected.y >= 0 && vSelected.y < vWorldSize.y) ++pWorld[vSelected.y * vWorldSize.x + vSelected.x] %= 6; } // Labmda function to convert "world" coordinate into screen space auto ToScreen = [&](int x, int y) { return olc::vi2d { (vOrigin.x * vTileSize.x) + (x - y) * (vTileSize.x / 2), (vOrigin.y * vTileSize.y) + (x + y) * (vTileSize.y / 2) }; }; // Draw World - has binary transparancy so enable masking SetPixelMode(olc::Pixel::MASK); // (0,0) is at top, defined by vOrigin, so draw from top to bottom // to ensure tiles closest to camera are drawn last for (int y = 0; y < vWorldSize.y; y++) { for (int x = 0; x < vWorldSize.x; x++) { // Convert cell coordinate to world space olc::vi2d vWorld = ToScreen(x, y); switch(pWorld[y*vWorldSize.x + x]) { case 0: // Invisble Tile DrawPartialSprite(vWorld.x, vWorld.y, sprIsom, 1 * vTileSize.x, 0, vTileSize.x, vTileSize.y); break; case 1: // Visible Tile DrawPartialSprite(vWorld.x, vWorld.y, sprIsom, 2 * vTileSize.x, 0, vTileSize.x, vTileSize.y); break; case 2: // Tree DrawPartialSprite(vWorld.x, vWorld.y - vTileSize.y, sprIsom, 0 * vTileSize.x, 1 * vTileSize.y, vTileSize.x, vTileSize.y * 2); break; case 3: // Spooky Tree DrawPartialSprite(vWorld.x, vWorld.y - vTileSize.y, sprIsom, 1 * vTileSize.x, 1 * vTileSize.y, vTileSize.x, vTileSize.y * 2); break; case 4: // Beach DrawPartialSprite(vWorld.x, vWorld.y - vTileSize.y, sprIsom, 2 * vTileSize.x, 1 * vTileSize.y, vTileSize.x, vTileSize.y * 2); break; case 5: // Water DrawPartialSprite(vWorld.x, vWorld.y - vTileSize.y, sprIsom, 3 * vTileSize.x, 1 * vTileSize.y, vTileSize.x, vTileSize.y * 2); break; } } } // Draw Selected Cell - Has varying alpha components SetPixelMode(olc::Pixel::ALPHA); // Convert selected cell coordinate to world space olc::vi2d vSelectedWorld = ToScreen(vSelected.x, vSelected.y); // Draw "highlight" tile DrawPartialSprite(vSelectedWorld.x, vSelectedWorld.y, sprIsom, 0 * vTileSize.x, 0, vTileSize.x, vTileSize.y); // Go back to normal drawing with no expected transparency SetPixelMode(olc::Pixel::NORMAL); // Draw Hovered Cell Boundary //DrawRect(vCell.x * vTileSize.x, vCell.y * vTileSize.y, vTileSize.x, vTileSize.y, olc::RED); // Draw Debug Info DrawString(4, 4, "Mouse : " + std::to_string(vMouse.x) + ", " + std::to_string(vMouse.y), olc::BLACK); DrawString(4, 14, "Cell : " + std::to_string(vCell.x) + ", " + std::to_string(vCell.y), olc::BLACK); DrawString(4, 24, "Selected: " + std::to_string(vSelected.x) + ", " + std::to_string(vSelected.y), olc::BLACK); return true; } }; int main() { IsometricDemo demo; if (demo.Construct(512, 480, 2, 2)) demo.Start(); return 0; }