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gradation body and outline.
[ 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) {}; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofSetWindowTitle("openframeworks"); ofBackground(0); } //-------------------------------------------------------------- void ofApp::update() { ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5); ofColor color, tmp_color; for (int k = 0; k < 23; k++) { auto noise_seed = glm::vec2(ofRandom(1000), ofRandom(1000)); color.setHsb((int)ofRandom(200, 280) % 255, 255,255); ofMesh mesh, line; line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); vector<glm::vec3> right, left; glm::vec3 last_location; float last_theta; int len = 30; int head_size = 15; for (int i = 0; i < len; i++) { auto location = glm::vec3(ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i) * 0.005), 0, 1, -325, 325), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i) * 0.005), 0, 1, -350, 350), 0); auto next = glm::vec3(ofMap(ofNoise(noise_seed.x, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -325, 325), ofMap(ofNoise(noise_seed.y, (ofGetFrameNum() + i + 1) * 0.005), 0, 1, -350, 350), 0); auto direction = next - location; auto theta = atan2(direction.y, direction.x); right.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta + PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta + PI * 0.5), 0)); left.push_back(location + glm::vec3(ofMap(i, 0, len, 0, head_size) * cos(theta - PI * 0.5), ofMap(i, 0, len, 0, head_size) * sin(theta - PI * 0.5), 0)); last_location = location; last_theta = theta; } for (int i = 0; i < right.size(); i++) { mesh.addVertex(left[i]); mesh.addVertex(right[i]); line.addVertex(left[i]); line.addVertex(right[i]); if (i > right.size() * 0.5) { tmp_color.setHsb(color.getHue(), color.getSaturation(), ofMap(i, right.size(), right.size() * 0.5, color.getBrightness(), 16)); } else { tmp_color.setHsb(color.getHue(), color.getSaturation(), 32); } mesh.addColor(tmp_color); mesh.addColor(tmp_color); line.addColor(color); line.addColor(color); } for (int i = 0; i < mesh.getNumVertices() - 2; i += 2) { mesh.addIndex(i + 0); mesh.addIndex(i + 1); mesh.addIndex(i + 3); mesh.addIndex(i + 0); mesh.addIndex(i + 2); mesh.addIndex(i + 3); line.addIndex(i + 0); line.addIndex(i + 2); line.addIndex(i + 1); line.addIndex(i + 3); } auto tmp_head_size = ofMap(len - 2, 0, len, 0, head_size); tmp_color.setHsb(color.getHue(), color.getSaturation(), ofMap(len - 2, right.size(), right.size() * 0.5, color.getBrightness(), 16)); mesh.addVertex(last_location); mesh.addColor(tmp_color); line.addVertex(last_location); line.addColor(color); int index = mesh.getNumVertices(); tmp_color.setHsb(color.getHue(), color.getSaturation(), ofMap(len, right.size(), right.size() * 0.5, color.getBrightness(), 16)); for (auto theta = last_theta - PI * 0.5; theta <= last_theta + PI * 0.5; theta += PI / 20) { mesh.addVertex(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0)); line.addVertex(last_location + glm::vec3(tmp_head_size * cos(theta), tmp_head_size * sin(theta), 0)); mesh.addColor(tmp_color); line.addColor(color); } for (int i = index; i < mesh.getNumVertices() - 1; i++) { mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1); line.addIndex(i + 0); line.addIndex(i + 1); } mesh.draw(); line.drawWireframe(); } } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |
[ Link ]
https://github.com/junkiyoshi/Insta20210614
[ Kinako ]