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引き続きofxBulletを使って3D物理演算です。
Boxの中にBoxが入っていますが、距離が近いもの同士で線で結ぶようにしました。お互いの距離が近いほど濃い色、遠くなれば薄くなります。
Particleを線で繋いでいく手法は良くやるのですが、物理演算と組み合わせるといつもと違う動きが見えて面白いです。あまり激しく動かすと壁をすり抜けて飛んでいくヤツがチラホラいますね(笑)
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#pragma once #include "ofMain.h" #include "ofxBullet.h" class ofApp : public ofBaseApp { public: ~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 windowResized(int w, int h) {}; void dragEvent(ofDragInfo dragInfo) {}; void gotMessage(ofMessage msg) {}; ofCamera cam; ofLight light; ofxBulletWorldRigid world; ofxBulletCustomShape* boundsShape; vector<ofxBulletBox*> boxes; vector<ofColor> boxes_color; }; |
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#include "ofApp.h" //-------------------------------------------------------------- ofApp::~ofApp() { delete this->boundsShape; for (ofxBulletBox* tmp : this->boxes) { delete tmp; } this->boxes.clear(); } //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofBackground(0); ofSetWindowTitle("Insta"); ofEnableDepthTest(); ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_ADD); this->cam.setPosition(ofVec3f(0, 3.f, -30.f)); this->cam.lookAt(ofVec3f(0, 0, 0), ofVec3f(0, -1, 0)); this->world.setup(); this->world.enableGrabbing(); this->world.setCamera(&this->cam); this->world.setGravity(ofVec3f(0.0, 64.0, 0)); ofVec3f start_location; ofPoint dimens; float bounds_width = 400; float h_width = bounds_width * 0.5; float depth = 10.; float h_depth = depth * 0.5; this->boundsShape = new ofxBulletCustomShape(); this->boundsShape->create(world.world, ofVec3f(0, 0, 0), 10.); for (int i = 0; i < 6; i++) { if (i == 0) { // ground // start_location.set(0., h_width + h_depth, 0.); dimens.set(bounds_width, depth, bounds_width); } else if (i == 1) { // back wall // start_location.set(0, 0, h_width + h_depth); dimens.set(bounds_width, bounds_width, depth); } else if (i == 2) { // right wall // start_location.set(h_width + h_depth, 0, 0.); dimens.set(depth, bounds_width, bounds_width); } else if (i == 3) { // left wall // start_location.set(-h_width - h_depth, 0, 0.); dimens.set(depth, bounds_width, bounds_width); } else if (i == 4) { // ceiling // start_location.set(0, -h_width - h_depth, 0.); dimens.set(bounds_width, depth, bounds_width); } else if (i == 5) { // front wall // start_location.set(0, 0, -h_width - h_depth); dimens.set(bounds_width, bounds_width, depth); } btBoxShape* boxShape = ofBtGetBoxCollisionShape(dimens.x, dimens.y, dimens.z); this->boundsShape->addShape(boxShape, start_location); } this->boundsShape->add(); for (int i = 0; i < 512; i++) { ofxBulletBox* box = new ofxBulletBox(); float size = 10; box->create(this->world.world, ofVec3f(ofRandom(-100, 100), ofRandom(-100, 100), ofRandom(-100, 100)), 1.0, size, size, size); box->setRestitution(1.0); box->add(); this->boxes.push_back(box); ofColor color; color.setHsb(ofRandom(255), 255, 255); this->boxes_color.push_back(color); } this->light.setPosition(ofVec3f(0, 0, 512)); } //-------------------------------------------------------------- void ofApp::update() { if (!ofGetMousePressed()) { ofVec3f diff = ofVec3f(0, 0, 0) - boundsShape->getPosition(); diff *= 500.f; boundsShape->applyCentralForce(diff); } this->world.update(); } //-------------------------------------------------------------- void ofApp::draw() { ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2); //ofEnableLighting(); //this->light.enable(); ofNoFill(); if (ofGetMousePressed()) { ofSetColor(255, 255, 0); } else { ofSetColor(255); } boundsShape->transformGL(); ofDrawBox(ofVec3f(0, 0, 0), 400); boundsShape->restoreTransformGL(); ofFill(); for (int i = 0; i < this->boxes.size(); i++) { ofSetColor(this->boxes_color[i], 128); ofDrawBox(this->boxes[i]->getPosition(), 3, 3, 3); for (int j = i + 1; j < this->boxes.size(); j++) { float distance = this->boxes[i]->getPosition().distanceSquared(this->boxes[j]->getPosition()); if (distance < 40 * 40) { ofSetColor(this->boxes_color[i], ofMap(distance, 0, 40 * 40, 255, 0)); ofDrawLine(this->boxes[i]->getPosition(), this->boxes[j]->getPosition()); } } } } //-------------------------------------------------------------- void ofApp::keyPressed(int key) { if (key == 'a') { this->world.setGravity(ofVec3f(0.0, 0.0, 0)); } if (key == 's') { this->world.setGravity(ofVec3f(0.0, 64.0, 0)); } } //======================================================================== int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |