[work 114] Undulation in Box
Movie
Source code
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#include "ofMain.h" #include "ofApp.h" //================================ int main( ){ // 4K:4096x2160 // 2K:2048x1080 // FullHD:1920x1080 // HD:1440x1080 // HD720p:1280x720 // DVD:720x480 // setup the GL context ofSetupOpenGL(1280, 720, OF_WINDOW); // this kicks off the running of my app // can be OF_WINDOW or OF_FULLSCREEN // pass in width and height too: ofRunApp( new ofApp()); }
#pragma once #include "ofMain.h" class ofApp : public ofBaseApp{ public: ofApp(); ~ofApp(); void setup(); void update(); void draw(); void keyPressed(int key); void keyReleased(int key); void mouseMoved(int x, int y); void mouseDragged(int x, int y, int button); void mousePressed(int x, int y, int button); void mouseReleased(int x, int y, int button); void mouseEntered(int x, int y); void mouseExited(int x, int y); void windowResized(int w, int h); void dragEvent(ofDragInfo dragInfo); void gotMessage(ofMessage msg); private: int step; int nofp; std::vector<ofMesh> mesh; std::vector<std::vector<ofVec3f>> points; std::vector<float> radius; float time; float dt; ofRectangle area; ofEasyCam cam; };
#include "ofApp.h" ofApp::ofApp(){ } ofApp::~ofApp(){ } //-------------------------------------------------------------- void ofApp::setup(){ double fps = 30; ofSetFrameRate(fps); ofBackground(255); ofSetBackgroundAuto(true); ofSetVerticalSync(true); ofEnableDepthTest(); ofEnableSmoothing(); cam.setPosition(glm::vec3(300, 300, 300)); cam.lookAt(glm::vec3(0, 0, 0)); time = ofRandom(10000); float y = ofMap(ofSignedNoise(time, time, time), -1, 1, -100, 100); step = 6; nofp = 360 / step; std::vector<ofVec3f> p; ofVec3f v = ofVec3f(1, y, 0); for (int i = 0; i < nofp; i++) { v.rotate(step, ofVec3f(0, 1, 0)); p.push_back(v); } points.assign(2, p); radius.assign(2, 1); dt = 0; area.setFromCenter(glm::vec3(0, 0, 0), 500, 500); } //-------------------------------------------------------------- void ofApp::update(){ for (int i = 0; i < radius.size() - 1; i++) { radius.at(i) += 1; } mesh.clear(); for (int i = 0; i < points.size(); i++) { for (int j = 0; j < points.at(i).size(); j++) { points.at(i).at(j).y = 0; points.at(i).at(j).normalize(); float x = points.at(i).at(j).x * radius.at(i); float z = points.at(i).at(j).z * radius.at(i); if (area.getLeft() > x) { float tmp = (z / x) * area.getLeft(); x = area.getLeft(); z = tmp; } else if (area.getRight() < x) { float tmp = (z / x) * area.getRight(); x = area.getRight(); z = tmp; } if (area.getTop() > z) { float tmp = (x / z) * area.getTop(); z = area.getTop(); x = tmp; } else if (area.getBottom() < z) { float tmp = (x / z) * area.getBottom(); z = area.getBottom(); x = tmp; } float dt0 = x * 0.003; float dt1 = z * 0.003; points.at(i).at(j).x = x; points.at(i).at(j).y = ofMap(ofSignedNoise(time + dt0, time + dt1, time + dt), -1, 1, -100, 100); points.at(i).at(j).z = z; } } auto itr = radius.rbegin(); if (*(itr + 1) > 10) { float y = ofMap(ofSignedNoise(time, time, time + dt), -1, 1, -100, 100); step = 6; nofp = 360 / step; std::vector<ofVec3f> p; ofVec3f v = ofVec3f(1, y, 0); for (int i = 0; i < nofp; i++) { v.rotate(step, ofVec3f(0, 1, 0)); p.push_back(v); } points.push_back(p); radius.push_back(1); } if (radius.front() >= glm::length(area.getTopLeft())) { auto rItr = radius.begin(); radius.erase(rItr); auto pItr = points.begin(); points.erase(pItr); } for (int i = 0; i < points.size() - 1; i++) { ofMesh m; m.setMode(OF_PRIMITIVE_TRIANGLE_STRIP); for (int j = 0; j <= points.at(i).size(); j++) { int index = j % points.at(i).size(); m.addVertex(points.at(i).at(index)); m.addVertex(points.at(i + 1).at(index)); ofColor c0, c1; c0 = ofColor(0, 0, 255); c1 = ofColor(0, 0, 255); float a0 = ofMap(points.at(i).at(index).y, -100, 100, 255, 0); float a1 = ofMap(points.at(i + 1).at(index).y, -100, 100, 255, 0); m.addColor(ofColor(c0, a0)); m.addColor(ofColor(c1, a1)); } mesh.push_back(m); } dt += 0.003; } //-------------------------------------------------------------- void ofApp::draw(){ cam.begin(); ofRotateYDeg(ofGetFrameNum() * 0.25); ofSetLineWidth(1); for (ofMesh m : mesh) { m.drawWireframe(); } ofSetColor(0); ofNoFill(); ofSetLineWidth(3); ofDrawBox(0, 0, 0, area.width, 200, area.height); cam.end(); } //-------------------------------------------------------------- void ofApp::keyPressed(int key){ if (key == 's') { ofImage img; img.grabScreen(0, 0, ofGetWidth(), ofGetHeight()); img.save("screenshot.png"); } }
Link to the reference page
ソースコードで使用したAPIの中から要点になりそうなものをいくつか選んでリストアップしました。
category | API/Lib |
openframeworks | ofMesh |
openframeworks | ofSignedNoise |
openframeworks | ofMap |
openframeworks | ofColor |
c++ | std::vector |
Development environment
- openframeworks 0.10.1
- c++
- macOS
- Xcode