box2d – プログラミング de 落描き

2023年2月9日

Soulfull. Draw by openFrameworks

[ Video ]

[ About ]
魂。

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofxBox2d.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;
	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<vector<glm::vec2>> log_list;
};

#pragma once

#include "ofMain.h"

#include "ofxBox2d.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;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<vector<glm::vec2>> log_list;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(255);
	ofEnableDepthTest();

	this->radius = 30;

	this->box2d.init();
	this->box2d.setGravity(0, 0);
	this->box2d.createBounds(30, 30, ofGetWidth() - 60, ofGetHeight() - 60);
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();

	for (int i = 0; i < 40; i++) {

		auto circle = make_shared<ofxBox2dCircle>();
		circle->setPhysics(0.5, 0.63, 0.1);
		circle->setup(this->box2d.getWorld(), ofRandom(30, ofGetWidth() - 30), ofRandom(30, ofGetHeight() - 30), this->radius);
		this->circles.push_back(circle);
		vector<glm::vec2> log;
		this->log_list.push_back(log);
	}
}

//--------------------------------------------------------------
void ofApp::update() {

	ofSeedRandom(39);

	for (int i = 0; i < this->circles.size(); i++) {

		for (int j = i + 1; j < this->circles.size(); j++) {

			float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());
			if (distance < this->radius * 4) {

				this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), ofMap(distance, this->radius, this->radius * 4, 1.6, 0.004));
				this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), ofMap(distance, this->radius, this->radius * 4, 1.6, 0.004));
			}
		}
	}

	for (int i = 0; i < this->circles.size(); i++) {

		this->log_list[i].push_back(this->circles[i]->getPosition());
		while (this->log_list[i].size() > 25) {

			this->log_list[i].erase(this->log_list[i].begin());
		}
	}

	this->box2d.update();
}

//--------------------------------------------------------------
void ofApp::draw() {

	auto threshold = 110;
	int head_size = 8;

	ofColor color;
	ofSetLineWidth(1);

	vector<glm::vec2> locations;
	for (int i = 0; i < this->circles.size(); i++) {

		glm::vec2 location = this->circles[i]->getPosition();
		locations.push_back(location);

		auto hue = ofMap(i, 0, this->circles.size(), 0, 255);
		color.setHsb(hue, 255, 255);
		ofSetColor(color);

		if (this->log_list[i].size() < 2) continue;

		ofMesh mesh;
		vector<glm::vec3> right, left, frame;
		glm::vec3 last_location;
		float last_theta;

		for (int k = 0; k < this->log_list[i].size() - 1; k++) {

			auto location = glm::vec3(this->log_list[i][k], 0);
			auto next = glm::vec3(this->log_list[i][k + 1], 0);

			auto direction = next - location;
			auto theta = atan2(direction.y, direction.x);

			right.push_back(location + glm::vec3(ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * cos(theta + PI * 0.5), ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * sin(theta + PI * 0.5), 0));
			left.push_back(location + glm::vec3(ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * cos(theta - PI * 0.5), ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * sin(theta - PI * 0.5), 0));

			last_location = location;
			last_theta = theta;
		}

		for (int k = 0; k < right.size(); k++) {

			mesh.addVertex(left[k]);
			mesh.addVertex(right[k]);
		}

		for (int k = 0; k < mesh.getNumVertices() - 2; k += 2) {

			mesh.addIndex(k + 0); mesh.addIndex(k + 1); mesh.addIndex(k + 3);
			mesh.addIndex(k + 0); mesh.addIndex(k + 2); mesh.addIndex(k + 3);
		}

		auto tmp_head_size = ofMap(log_list[i].size() - 2, 0, log_list[i].size(), 0.1, head_size);
		mesh.addVertex(last_location);

		int index = mesh.getNumVertices();
		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));
		}

		for (int i = index; i < mesh.getNumVertices() - 1; i++) {

			mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1);
		}

		mesh.draw();

		ofFill();
		ofDrawCircle(this->log_list[i].back(), 8);
	}

	ofSetColor(0);
	ofSetLineWidth(1);

	for (auto& location : locations) {

		int word_index = 0;
		for (auto& other : locations) {

			if (location == other) { continue; }

			auto distance = glm::distance(location, other);
			if (distance < threshold) {

				auto direction_rad = std::atan2(other.y - location.y, other.x - location.x);
				auto direction = direction_rad * RAD_TO_DEG;
				auto width = ofMap(distance, 0, threshold, 360, 0);

				ofPushMatrix();
				ofTranslate(location);

				ofNoFill();
				ofBeginShape();
				for (auto deg = direction - width * 0.5; deg <= direction + width * 0.5; deg++) {

					ofVertex(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));
				}
				ofEndShape();

				ofDrawLine(glm::vec2(radius * cos(direction * DEG_TO_RAD), radius * sin(direction * DEG_TO_RAD)),
					(other - location) + glm::vec2(radius * cos((180 + direction) * DEG_TO_RAD), radius * sin((180 + direction) * DEG_TO_RAD)));

				ofPopMatrix();
			}
		}
	}
}

//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(255);

ofEnableDepthTest();

this->radius = 30;

this->box2d.init();

this->box2d.setGravity(0, 0);

this->box2d.createBounds(30, 30, ofGetWidth() - 60, ofGetHeight() - 60);

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

for (int i = 0; i < 40; i++) {

auto circle = make_shared<ofxBox2dCircle>();

circle->setPhysics(0.5, 0.63, 0.1);

circle->setup(this->box2d.getWorld(), ofRandom(30, ofGetWidth() - 30), ofRandom(30, ofGetHeight() - 30), this->radius);

this->circles.push_back(circle);

vector<glm::vec2> log;

this->log_list.push_back(log);

}

//--------------------------------------------------------------

void ofApp::update() {

ofSeedRandom(39);

for (int i = 0; i < this->circles.size(); i++) {

for (int j = i + 1; j < this->circles.size(); j++) {

float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());

if (distance < this->radius * 4) {

this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), ofMap(distance, this->radius, this->radius * 4, 1.6, 0.004));

this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), ofMap(distance, this->radius, this->radius * 4, 1.6, 0.004));

}

for (int i = 0; i < this->circles.size(); i++) {

this->log_list[i].push_back(this->circles[i]->getPosition());

while (this->log_list[i].size() > 25) {

this->log_list[i].erase(this->log_list[i].begin());

}

this->box2d.update();

}

//--------------------------------------------------------------

void ofApp::draw() {

auto threshold = 110;

int head_size = 8;

ofColor color;

ofSetLineWidth(1);

vector<glm::vec2> locations;

for (int i = 0; i < this->circles.size(); i++) {

glm::vec2 location = this->circles[i]->getPosition();

locations.push_back(location);

auto hue = ofMap(i, 0, this->circles.size(), 0, 255);

color.setHsb(hue, 255, 255);

ofSetColor(color);

if (this->log_list[i].size() < 2) continue;

ofMesh mesh;

vector<glm::vec3> right, left, frame;

glm::vec3 last_location;

float last_theta;

for (int k = 0; k < this->log_list[i].size() - 1; k++) {

auto location = glm::vec3(this->log_list[i][k], 0);

auto next = glm::vec3(this->log_list[i][k + 1], 0);

auto direction = next - location;

auto theta = atan2(direction.y, direction.x);

right.push_back(location + glm::vec3(ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * cos(theta + PI * 0.5), ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * sin(theta + PI * 0.5), 0));

left.push_back(location + glm::vec3(ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * cos(theta - PI * 0.5), ofMap(k, 0, this->log_list[i].size(), 0.1, head_size) * sin(theta - PI * 0.5), 0));

last_location = location;

last_theta = theta;

}

for (int k = 0; k < right.size(); k++) {

mesh.addVertex(left[k]);

mesh.addVertex(right[k]);

}

for (int k = 0; k < mesh.getNumVertices() - 2; k += 2) {

mesh.addIndex(k + 0); mesh.addIndex(k + 1); mesh.addIndex(k + 3);

mesh.addIndex(k + 0); mesh.addIndex(k + 2); mesh.addIndex(k + 3);

}

auto tmp_head_size = ofMap(log_list[i].size() - 2, 0, log_list[i].size(), 0.1, head_size);

mesh.addVertex(last_location);

int index = mesh.getNumVertices();

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));

}

for (int i = index; i < mesh.getNumVertices() - 1; i++) {

mesh.addIndex(index); mesh.addIndex(i + 0); mesh.addIndex(i + 1);

}

mesh.draw();

ofFill();

ofDrawCircle(this->log_list[i].back(), 8);

}

ofSetColor(0);

ofSetLineWidth(1);

for (auto& location : locations) {

int word_index = 0;

for (auto& other : locations) {

if (location == other) { continue; }

auto distance = glm::distance(location, other);

if (distance < threshold) {

auto direction_rad = std::atan2(other.y - location.y, other.x - location.x);

auto direction = direction_rad * RAD_TO_DEG;

auto width = ofMap(distance, 0, threshold, 360, 0);

ofPushMatrix();

ofTranslate(location);

ofNoFill();

ofBeginShape();

for (auto deg = direction - width * 0.5; deg <= direction + width * 0.5; deg++) {

ofVertex(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));

}

ofEndShape();

ofDrawLine(glm::vec2(radius * cos(direction * DEG_TO_RAD), radius * sin(direction * DEG_TO_RAD)),

(other - location) + glm::vec2(radius * cos((180 + direction) * DEG_TO_RAD), radius * sin((180 + direction) * DEG_TO_RAD)));

ofPopMatrix();

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20230209

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2022年7月5日

velocity to rotation. draw by openFrameworks

[ Video ]

[ About ]
速度を回転に。

velocity to rotation.

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofxBox2d.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;
	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dCircle>> circles;
	vector<glm::vec3> rotation_list;
};

#pragma once

#include "ofMain.h"

#include "ofxBox2d.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;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circles;

vector<glm::vec3> rotation_list;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(0);
	ofEnableDepthTest();

	this->radius = 30;

	this->box2d.init();
	this->box2d.setGravity(0, 0);
	this->box2d.createBounds(30, 30, ofGetWidth() - 60, ofGetHeight() - 60);
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();

	for (int i = 0; i < 40; i++) {

		auto circle = make_shared<ofxBox2dCircle>();
		circle->setPhysics(0.5, 0.63, 0.1);
		circle->setup(this->box2d.getWorld(), ofRandom(30, ofGetWidth() - 30), ofRandom(30, ofGetHeight() - 30), this->radius);
		this->circles.push_back(circle);
		this->rotation_list.push_back(glm::vec3(ofRandom(360), ofRandom(360), ofRandom(360)));
	}
}

//--------------------------------------------------------------
void ofApp::update() {

	ofSeedRandom(39);

	for (int i = 0; i < this->circles.size(); i++) {

		for (int j = i + 1; j < this->circles.size(); j++) {

			float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());
			if (distance < this->radius * 4) {

				this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), ofMap(distance, this->radius, this->radius * 4, 1.8, 0.002));
				this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), ofMap(distance, this->radius, this->radius * 4, 1.8, 0.002));
			}
		}
	}

	this->box2d.update();
}

//--------------------------------------------------------------
void ofApp::draw() {

	auto threshold = 110;

	ofColor color;
	ofSetLineWidth(2);

	vector<glm::vec2> locations;
	for (int i = 0; i < this->circles.size(); i++) {

		glm::vec2 location = this->circles[i]->getPosition();
		locations.push_back(location);

		ofPushMatrix();
		ofTranslate(location.x, location.y);

		this->rotation_list[i].x += this->circles[i]->getVelocity().length() * 3;
		this->rotation_list[i].y += this->circles[i]->getVelocity().length() * 3;
		this->rotation_list[i].z += this->circles[i]->getVelocity().length() * 3;

		ofRotateZ(this->rotation_list[i].z);
		ofRotateY(this->rotation_list[i].y);
		ofRotateX(this->rotation_list[i].x);

		auto hue = ofMap(i, 0, this->circles.size(), 0, 255);
		color.setHsb(hue, 255, 255);
		ofSetColor(color);

		ofDrawCircle(glm::vec2(), this->radius * 0.5);

		ofPopMatrix();
	}

	ofSetColor(255);
	ofSetLineWidth(0.5);

	for (auto& location : locations) {

		int word_index = 0;
		for (auto& other : locations) {

			if (location == other) { continue; }

			auto distance = glm::distance(location, other);
			if (distance < threshold) {

				auto direction_rad = std::atan2(other.y - location.y, other.x - location.x);
				auto direction = direction_rad * RAD_TO_DEG;
				auto width = ofMap(distance, 0, threshold, 360, 0);

				ofPushMatrix();
				ofTranslate(location);

				ofNoFill();
				ofBeginShape();
				for (auto deg = direction - width * 0.5; deg <= direction + width * 0.5; deg++) {

					ofVertex(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));
				}
				ofEndShape();

				ofDrawLine(glm::vec2(radius * cos(direction * DEG_TO_RAD), radius * sin(direction * DEG_TO_RAD)),
					(other - location) + glm::vec2(radius * cos((180 + direction) * DEG_TO_RAD), radius * sin((180 + direction) * DEG_TO_RAD)));

				ofPopMatrix();
			}
		}
	}
}

//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(0);

ofEnableDepthTest();

this->radius = 30;

this->box2d.init();

this->box2d.setGravity(0, 0);

this->box2d.createBounds(30, 30, ofGetWidth() - 60, ofGetHeight() - 60);

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

for (int i = 0; i < 40; i++) {

auto circle = make_shared<ofxBox2dCircle>();

circle->setPhysics(0.5, 0.63, 0.1);

circle->setup(this->box2d.getWorld(), ofRandom(30, ofGetWidth() - 30), ofRandom(30, ofGetHeight() - 30), this->radius);

this->circles.push_back(circle);

this->rotation_list.push_back(glm::vec3(ofRandom(360), ofRandom(360), ofRandom(360)));

}

//--------------------------------------------------------------

void ofApp::update() {

ofSeedRandom(39);

for (int i = 0; i < this->circles.size(); i++) {

for (int j = i + 1; j < this->circles.size(); j++) {

float distance = this->circles[i]->getPosition().distance(this->circles[j]->getPosition());

if (distance < this->radius * 4) {

this->circles[i]->addForce(this->circles[i]->getPosition() - this->circles[j]->getPosition(), ofMap(distance, this->radius, this->radius * 4, 1.8, 0.002));

this->circles[j]->addForce(this->circles[j]->getPosition() - this->circles[i]->getPosition(), ofMap(distance, this->radius, this->radius * 4, 1.8, 0.002));

}

this->box2d.update();

}

//--------------------------------------------------------------

void ofApp::draw() {

auto threshold = 110;

ofColor color;

ofSetLineWidth(2);

vector<glm::vec2> locations;

for (int i = 0; i < this->circles.size(); i++) {

glm::vec2 location = this->circles[i]->getPosition();

locations.push_back(location);

ofPushMatrix();

ofTranslate(location.x, location.y);

this->rotation_list[i].x += this->circles[i]->getVelocity().length() * 3;

this->rotation_list[i].y += this->circles[i]->getVelocity().length() * 3;

this->rotation_list[i].z += this->circles[i]->getVelocity().length() * 3;

ofRotateZ(this->rotation_list[i].z);

ofRotateY(this->rotation_list[i].y);

ofRotateX(this->rotation_list[i].x);

auto hue = ofMap(i, 0, this->circles.size(), 0, 255);

color.setHsb(hue, 255, 255);

ofSetColor(color);

ofDrawCircle(glm::vec2(), this->radius * 0.5);

ofPopMatrix();

}

ofSetColor(255);

ofSetLineWidth(0.5);

for (auto& location : locations) {

int word_index = 0;

for (auto& other : locations) {

if (location == other) { continue; }

auto distance = glm::distance(location, other);

if (distance < threshold) {

auto direction_rad = std::atan2(other.y - location.y, other.x - location.x);

auto direction = direction_rad * RAD_TO_DEG;

auto width = ofMap(distance, 0, threshold, 360, 0);

ofPushMatrix();

ofTranslate(location);

ofNoFill();

ofBeginShape();

for (auto deg = direction - width * 0.5; deg <= direction + width * 0.5; deg++) {

ofVertex(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD));

}

ofEndShape();

ofDrawLine(glm::vec2(radius * cos(direction * DEG_TO_RAD), radius * sin(direction * DEG_TO_RAD)),

(other - location) + glm::vec2(radius * cos((180 + direction) * DEG_TO_RAD), radius * sin((180 + direction) * DEG_TO_RAD)));

ofPopMatrix();

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220705

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2021年10月1日2021年10月1日

Pair of faucets. Draw by openFrameworks

[ Video ]

[ About ]
位置と色はフレーム番号から計算して、対になる方には反対の値とする。

The position and color are calculated from the frame number, and the opposite for the pair.

[ Source ]

#pragma once
#include "ofMain.h"
#include "ofxBox2d.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) {};

	ofEasyCam cam;

	ofxBox2d box2d;
	vector<shared_ptr<ofxBox2dCircle>> circle_list;
	vector<float> radius_list;
	vector<float> life_list;
	vector<ofColor> color_list;
};

#pragma once

#include "ofMain.h"

#include "ofxBox2d.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) {};

ofEasyCam cam;

ofxBox2d box2d;

vector<shared_ptr<ofxBox2dCircle>> circle_list;

vector<float> radius_list;

vector<float> life_list;

vector<ofColor> color_list;

};

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {

	ofSetFrameRate(60);
	ofSetWindowTitle("openFrameworks");

	ofBackground(239);
	ofSetCircleResolution(60);

	this->box2d.init();
	this->box2d.setGravity(0, 50);
	this->box2d.createBounds();
	this->box2d.setFPS(60);
	this->box2d.registerGrabbing();
}

//--------------------------------------------------------------
void ofApp::update() {

	for (int i = this->circle_list.size() - 1; i > -1; i--) {

		this->life_list[i] -= 1;

		if (this->life_list[i] < 0) {

			this->circle_list.erase(this->circle_list.begin() + i);
			this->radius_list.erase(this->radius_list.begin() + i);
			this->life_list.erase(this->life_list.begin() + i);
			this->color_list.erase(this->color_list.begin() + i);
		}
	}

	for (int i = 0; i < 2; i++) {

		int deg = ofMap(ofNoise(ofGetFrameNum() * 0.01), 0, 1, 0, 720) + i * 180;
		auto location = glm::vec2(ofGetWidth() * 0.5 + 150 * cos(deg * DEG_TO_RAD), 200 + 150 * sin(deg * DEG_TO_RAD));
		auto radius = 10;
		auto circle = make_shared<ofxBox2dCircle>();
		circle->setPhysics(0.5, 0.03, 0.1);
		circle->setup(this->box2d.getWorld(), location.x, location.y, radius);
		this->circle_list.push_back(circle);
		this->radius_list.push_back(radius);
		this->life_list.push_back(200);

		ofColor color;
		color.setHsb((ofGetFrameNum() + i * 128) % 255, 130, 255);
		this->color_list.push_back(color);
	}

	this->box2d.update();
}

//--------------------------------------------------------------
void ofApp::draw() {

	this->cam.begin();
	ofRotateX(180);
	ofTranslate(ofGetWidth() * -0.5, ofGetHeight() * -0.5);

	ofDrawCircle(glm::vec2(ofGetWidth() * 0.5, 200), 140);
	ofDrawCircle(glm::vec2(ofGetWidth() * 0.5, 200), 160);

	ofSetLineWidth(1);
	for (int i = 0; i < this->circle_list.size(); i++) {

		ofFill();
		ofSetColor(this->color_list[i]);
		ofDrawCircle(glm::vec2(this->circle_list[i]->getPosition()), this->radius_list[i]);

		ofNoFill();
		ofSetColor(39);
		ofDrawCircle(glm::vec2(this->circle_list[i]->getPosition()), this->radius_list[i]);

	}

	ofSetLineWidth(3);
	ofSetColor(39);
	ofDrawRectangle(0, 0, 720, 720);

	this->cam.end();
}


//--------------------------------------------------------------
int main() {

	ofSetupOpenGL(720, 720, OF_WINDOW);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

//--------------------------------------------------------------

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(239);

ofSetCircleResolution(60);

this->box2d.init();

this->box2d.setGravity(0, 50);

this->box2d.createBounds();

this->box2d.setFPS(60);

this->box2d.registerGrabbing();

}

//--------------------------------------------------------------

void ofApp::update() {

for (int i = this->circle_list.size() - 1; i > -1; i--) {

this->life_list[i] -= 1;

if (this->life_list[i] < 0) {

this->circle_list.erase(this->circle_list.begin() + i);

this->radius_list.erase(this->radius_list.begin() + i);

this->life_list.erase(this->life_list.begin() + i);

this->color_list.erase(this->color_list.begin() + i);

}

for (int i = 0; i < 2; i++) {

int deg = ofMap(ofNoise(ofGetFrameNum() * 0.01), 0, 1, 0, 720) + i * 180;

auto location = glm::vec2(ofGetWidth() * 0.5 + 150 * cos(deg * DEG_TO_RAD), 200 + 150 * sin(deg * DEG_TO_RAD));

auto radius = 10;

auto circle = make_shared<ofxBox2dCircle>();

circle->setPhysics(0.5, 0.03, 0.1);

circle->setup(this->box2d.getWorld(), location.x, location.y, radius);

this->circle_list.push_back(circle);

this->radius_list.push_back(radius);

this->life_list.push_back(200);

ofColor color;

color.setHsb((ofGetFrameNum() + i * 128) % 255, 130, 255);

this->color_list.push_back(color);

}

this->box2d.update();

}

//--------------------------------------------------------------

void ofApp::draw() {

this->cam.begin();

ofRotateX(180);

ofTranslate(ofGetWidth() * -0.5, ofGetHeight() * -0.5);

ofDrawCircle(glm::vec2(ofGetWidth() * 0.5, 200), 140);

ofDrawCircle(glm::vec2(ofGetWidth() * 0.5, 200), 160);

ofSetLineWidth(1);

for (int i = 0; i < this->circle_list.size(); i++) {

ofFill();

ofSetColor(this->color_list[i]);

ofDrawCircle(glm::vec2(this->circle_list[i]->getPosition()), this->radius_list[i]);

ofNoFill();

ofSetColor(39);

ofDrawCircle(glm::vec2(this->circle_list[i]->getPosition()), this->radius_list[i]);

}

ofSetLineWidth(3);

ofSetColor(39);

ofDrawRectangle(0, 0, 720, 720);

this->cam.end();

}

//--------------------------------------------------------------

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20211001

[ほしいものリスト]
Amazon

[ Sponsor Link ]

2024年11月
月	火	水	木	金	土	日
				1	2	3
4	5	6	7	8	9	10
11	12	13	14	15	16	17
18	19	20	21	22	23	24
25	26	27	28	29	30