diff --git a/Videos/OneLoneCoder_PGE_ProcGen_Universe.cpp b/Videos/OneLoneCoder_PGE_ProcGen_Universe.cpp new file mode 100644 index 0000000..8fc2e7a --- /dev/null +++ b/Videos/OneLoneCoder_PGE_ProcGen_Universe.cpp @@ -0,0 +1,372 @@ +/* + Procedural Generation: Programming The Universe + "Here we go again! Year 4 begins now..." - javidx9 + + License (OLC-3) + ~~~~~~~~~~~~~~~ + + Copyright 2018-2020 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/ZZY9YE7rZJw + + 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 2018, 2019, 2020 +*/ + + + +#define OLC_PGE_APPLICATION +#include "olcPixelGameEngine.h" + +#include + +constexpr uint32_t g_starColours[8] = +{ + 0xFFFFFFFF, 0xFFD9FFFF, 0xFFA3FFFF, 0xFFFFC8C8, + 0xFFFFCB9D, 0xFF9F9FFF, 0xFF415EFF, 0xFF28199D +}; + + +struct sPlanet +{ + double distance = 0.0; + double diameter = 0.0; + double foliage = 0.0; + double minerals = 0.0; + double water = 0.0; + double gases = 0.0; + double temperature = 0.0; + double population = 0.0; + bool ring = false; + std::vector vMoons; +}; + +class cStarSystem +{ +public: + cStarSystem(uint32_t x, uint32_t y, bool bGenerateFullSystem = false) + { + // Set seed based on location of star system + nProcGen = (x & 0xFFFF) << 16 | (y & 0xFFFF); + + // Not all locations contain a system + starExists = (rndInt(0, 20) == 1); + if (!starExists) return; + + // Generate Star + starDiameter = rndDouble(10.0, 40.0); + starColour.n = g_starColours[rndInt(0, 8)]; + + // When viewing the galaxy map, we only care about the star + // so abort early + if (!bGenerateFullSystem) return; + + // If we are viewing the system map, we need to generate the + // full system + + // Generate Planets + double dDistanceFromStar = rndDouble(60.0, 200.0); + int nPlanets = rndInt(0, 10); + for (int i = 0; i < nPlanets; i++) + { + sPlanet p; + p.distance = dDistanceFromStar; + dDistanceFromStar += rndDouble(20.0, 200.0); + p.diameter = rndDouble(4.0, 20.0); + + // Could make temeprature a function of distance from star + p.temperature = rndDouble(-200.0, 300.0); + + // Composition of planet + p.foliage = rndDouble(0.0, 1.0); + p.minerals = rndDouble(0.0, 1.0); + p.gases = rndDouble(0.0, 1.0); + p.water = rndDouble(0.0, 1.0); + + // Normalise to 100% + double dSum = 1.0 / (p.foliage + p.minerals + p.gases + p.water); + p.foliage *= dSum; + p.minerals *= dSum; + p.gases *= dSum; + p.water *= dSum; + + // Population could be a function of other habitat encouraging + // properties, such as temperature and water + p.population = std::max(rndInt(-5000000, 20000000), 0); + + // 10% of planets have a ring + p.ring = rndInt(0, 10) == 1; + + // Satellites (Moons) + int nMoons = std::max(rndInt(-5, 5), 0); + for (int n = 0; n < nMoons; n++) + { + // A moon is just a diameter for now, but it could be + // whatever you want! + p.vMoons.push_back(rndDouble(1.0, 5.0)); + } + + // Add planet to vector + vPlanets.push_back(p); + } + } + + ~cStarSystem() + { + + } + +public: + std::vector vPlanets; + +public: + bool starExists = false; + double starDiameter = 0.0f; + olc::Pixel starColour = olc::WHITE; + +private: + uint32_t nProcGen = 0; + + double rndDouble(double min, double max) + { + return ((double)rnd() / (double)(0x7FFFFFFF)) * (max - min) + min; + } + + int rndInt(int min, int max) + { + return (rnd() % (max - min)) + min; + } + + uint32_t rnd() + { + nProcGen += 0xe120fc15; + uint64_t tmp; + tmp = (uint64_t)nProcGen * 0x4a39b70d; + uint32_t m1 = (tmp >> 32) ^ tmp; + tmp = (uint64_t)m1 * 0x12fad5c9; + uint32_t m2 = (tmp >> 32) ^ tmp; + return m2; + } +}; + +class olcGalaxy : public olc::PixelGameEngine +{ +public: + olcGalaxy() + { + sAppName = "olcGalaxy"; + } + +public: + bool OnUserCreate() override + { + return true; + } + + olc::vf2d vGalaxyOffset = { 0,0 }; + bool bStarSelected = false; + uint32_t nSelectedStarSeed1 = 0; + uint32_t nSelectedStarSeed2 = 0; + + + /*uint32_t nLehmer = 0; + uint32_t Lehmer32() + { + nLehmer += 0xe120fc15; + uint64_t tmp; + tmp = (uint64_t)nLehmer * 0x4a39b70d; + uint32_t m1 = (tmp >> 32) ^ tmp; + tmp = (uint64_t)m1 * 0x12fad5c9; + uint32_t m2 = (tmp >> 32) ^ tmp; + return m2; + }*/ + + bool OnUserUpdate(float fElapsedTime) override + { + if (fElapsedTime <= 0.0001f) return true; + Clear(olc::BLACK); + + //if (GetKey(olc::SPACE).bReleased) + //{ + + // //srand(1000); + + // std::random_device rd; + // std::mt19937 mt(1000); + // std::uniform_int_distribution dist(0, 256); + + // auto tp1 = std::chrono::system_clock::now(); + // // Ranomness Tests + // for (int x = 0; x < ScreenWidth(); x++) + // { + // for (int y = 0; y < ScreenHeight(); y++) + // { + // bool bIsStar = false; + // int nSeed = y << 16 | x; + // + // // Standard C++ rand() + // //srand(nSeed); + // //bIsStar = rand() % 256 < 32; + + // // std::random + // //mt.seed(nSeed); + // //bIsStar = dist(mt) < 32; + + // // Lehmer32 + // nLehmer = nSeed; + // bIsStar = Lehmer32() % 256 < 32; + + // Draw(x, y, bIsStar ? olc::WHITE : olc::BLACK); + // } + // } + // auto tp2 = std::chrono::system_clock::now(); + // std::chrono::duration elapsedTime = tp2 - tp1; + // DrawString(3, 3, "Time: " + std::to_string(elapsedTime.count()), olc::RED, 2); + //} + + + //return true; + + + if (GetKey(olc::W).bHeld) vGalaxyOffset.y -= 50.0f * fElapsedTime; + if (GetKey(olc::S).bHeld) vGalaxyOffset.y += 50.0f * fElapsedTime; + if (GetKey(olc::A).bHeld) vGalaxyOffset.x -= 50.0f * fElapsedTime; + if (GetKey(olc::D).bHeld) vGalaxyOffset.x += 50.0f * fElapsedTime; + + int nSectorsX = ScreenWidth() / 16; + int nSectorsY = ScreenHeight() / 16; + + olc::vi2d mouse = { GetMouseX() / 16, GetMouseY() / 16 }; + olc::vi2d galaxy_mouse = mouse + vGalaxyOffset; + olc::vi2d screen_sector = { 0,0 }; + + for (screen_sector.x = 0; screen_sector.x < nSectorsX; screen_sector.x++) + for (screen_sector.y = 0; screen_sector.y < nSectorsY; screen_sector.y++) + { + uint32_t seed1 = (uint32_t)vGalaxyOffset.x + (uint32_t)screen_sector.x; + uint32_t seed2 = (uint32_t)vGalaxyOffset.y + (uint32_t)screen_sector.y; + + cStarSystem star(seed1, seed2); + if (star.starExists) + { + FillCircle(screen_sector.x * 16 + 8, screen_sector.y * 16 + 8, + (int)star.starDiameter / 8, star.starColour); + + // For convenience highlight hovered star + if (mouse.x == screen_sector.x && mouse.y == screen_sector.y) + { + DrawCircle(screen_sector.x * 16 + 8, screen_sector.y * 16 + 8, 12, olc::YELLOW); + } + } + } + + // Handle Mouse Click + if (GetMouse(0).bPressed) + { + uint32_t seed1 = (uint32_t)vGalaxyOffset.x + (uint32_t)mouse.x; + uint32_t seed2 = (uint32_t)vGalaxyOffset.y + (uint32_t)mouse.y; + + cStarSystem star(seed1, seed2); + if (star.starExists) + { + bStarSelected = true; + nSelectedStarSeed1 = seed1; + nSelectedStarSeed2 = seed2; + } + else + bStarSelected = false; + } + + // Draw Details of selected star system + if (bStarSelected) + { + // Generate full star system + cStarSystem star(nSelectedStarSeed1, nSelectedStarSeed2, true); + + // Draw Window + FillRect(8, 240, 496, 232, olc::DARK_BLUE); + DrawRect(8, 240, 496, 232, olc::WHITE); + + // Draw Star + olc::vi2d vBody = { 14, 356 }; + + vBody.x += star.starDiameter * 1.375; + FillCircle(vBody, (int)(star.starDiameter * 1.375), star.starColour); + vBody.x += (star.starDiameter * 1.375) + 8; + + + + // Draw Planets + for (auto& planet : star.vPlanets) + { + if (vBody.x + planet.diameter >= 496) break; + + vBody.x += planet.diameter; + FillCircle(vBody, (int)(planet.diameter * 1.0), olc::RED); + + olc::vi2d vMoon = vBody; + vMoon.y += planet.diameter + 10; + + // Draw Moons + for (auto& moon : planet.vMoons) + { + vMoon.y += moon; + FillCircle(vMoon, (int)(moon * 1.0), olc::GREY); + vMoon.y += moon + 10; + } + + vBody.x += planet.diameter + 8; + } + } + + return true; + } +}; + +int main() +{ + olcGalaxy demo; + if (demo.Construct(512, 480, 2, 2, false, false)) + demo.Start(); + return 0; +}