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円の内側に限定する。
移動先が中心から一定距離以下であれば、ノイズ関数のパラメータを進める。
Limit to inside the circle.
If the destination is less than a certain distance from the center, advance the parameters of the noise function.
[ Source ]
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#pragma once #include "ofMain.h" class ofApp : public ofBaseApp { public: 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 windowResized(int w, int h) {}; void dragEvent(ofDragInfo dragInfo) {}; void gotMessage(ofMessage msg) {}; float radius; vector<glm::vec2> base_location_list; vector<vector<glm::vec3>> log_list; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); ofNoFill(); this->radius = 200; for (float deg = 0; deg < 360; deg += 1.5) { auto location = glm::vec2(this->radius * cos(deg * DEG_TO_RAD), this->radius * sin(deg * DEG_TO_RAD)); this->base_location_list.push_back(location); } } //-------------------------------------------------------------- void ofApp::update() { this->log_list.clear(); for (int i = 0; i < this->base_location_list.size(); i++) { vector<glm::vec3> log; log.push_back(glm::vec3(this->base_location_list[i], 0)); this->log_list.push_back(log); } int step = 1; for (int i = 0; i < this->log_list.size(); i++) { int k = 0; while (this->log_list[i].size() < 330) { auto deg = ofMap(ofNoise(glm::vec4(this->log_list[i].back() * 0.015, (ofGetFrameNum() + k) * 0.005)), 0, 1, -360, 360); auto next = this->log_list[i].back() + glm::vec2(step * cos(deg * DEG_TO_RAD), step * sin(deg * DEG_TO_RAD)); if (glm::length(next) < this->radius) { this->log_list[i].push_back(next); } k++; } } } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); ofSetColor(139); for (int i = 0; i < this->log_list.size(); i++) { ofBeginShape(); ofVertices(this->log_list[i]); ofEndShape(); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |