programming – ページ 143 – プログラミング de 落描き

2022年7月6日

BlendMode SUBTRACT. Draw by openFrameworks

[ Video ]

[ About ]
ブレンドモード：サブトラクト。

BlendMode SUBTRACT.

[ Source ]

#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) {};
};

#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) {};

};

#include "ofApp.h"

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

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

	ofBackground(255);
	ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_SUBTRACT);
}

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

}

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

	ofTranslate(ofGetWindowSize() * 0.5);
	
	int radius = 250;
	float handle_len = radius * 0.5522;
	int number_of_location = 6;
	int deg_span = 360 / number_of_location;
	ofColor color;

	for (int k = 0; k < 5; k++) {

		color.setHsb(ofMap(k, 0, 5, 0, 255), 255, 255);
		ofSetColor(color);

		vector<glm::vec2> location_list;
		vector<float> deg_list;
		for (int deg = 0; deg < 360; deg += deg_span) {

			location_list.push_back(glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));
			deg_list.push_back(deg + 90);
		}

		for (int i = 0; i < location_list.size(); i++) {

			deg_list[i] += ofMap(ofNoise(glm::vec3(location_list[i] * 0.005, k * 0.03 + ofGetFrameNum() * 0.008)), 0, 1, -120, 120);
		}

		ofNoFill();
		ofSetLineWidth(2);

		ofBeginShape();
		for (int i = 0; i < location_list.size(); i++) {

			int n = (i + 1) % location_list.size();

			ofVertex(location_list[i]);
			ofBezierVertex(
				location_list[i] + glm::vec2(handle_len * cos(deg_list[i] * DEG_TO_RAD), handle_len * sin(deg_list[i] * DEG_TO_RAD)),
				location_list[n] + glm::vec2(handle_len * cos((deg_list[n] + 180) * DEG_TO_RAD), handle_len * sin((deg_list[n] + 180) * DEG_TO_RAD)),
				location_list[n]);
		}
		ofEndShape();
	}
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openFrameworks");

ofBackground(255);

ofEnableBlendMode(ofBlendMode::OF_BLENDMODE_SUBTRACT);

}

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

void ofApp::update() {

}

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

void ofApp::draw() {

ofTranslate(ofGetWindowSize() * 0.5);

int radius = 250;

float handle_len = radius * 0.5522;

int number_of_location = 6;

int deg_span = 360 / number_of_location;

ofColor color;

for (int k = 0; k < 5; k++) {

color.setHsb(ofMap(k, 0, 5, 0, 255), 255, 255);

ofSetColor(color);

vector<glm::vec2> location_list;

vector<float> deg_list;

for (int deg = 0; deg < 360; deg += deg_span) {

location_list.push_back(glm::vec2(radius * cos(deg * DEG_TO_RAD), radius * sin(deg * DEG_TO_RAD)));

deg_list.push_back(deg + 90);

}

for (int i = 0; i < location_list.size(); i++) {

deg_list[i] += ofMap(ofNoise(glm::vec3(location_list[i] * 0.005, k * 0.03 + ofGetFrameNum() * 0.008)), 0, 1, -120, 120);

}

ofNoFill();

ofSetLineWidth(2);

ofBeginShape();

for (int i = 0; i < location_list.size(); i++) {

int n = (i + 1) % location_list.size();

ofVertex(location_list[i]);

ofBezierVertex(

location_list[i] + glm::vec2(handle_len * cos(deg_list[i] * DEG_TO_RAD), handle_len * sin(deg_list[i] * DEG_TO_RAD)),

location_list[n] + glm::vec2(handle_len * cos((deg_list[n] + 180) * DEG_TO_RAD), handle_len * sin((deg_list[n] + 180) * DEG_TO_RAD)),

location_list[n]);

}

ofEndShape();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220706

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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());
}

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#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

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2022年7月4日

雨の夜。Draw by openFrameworks

[ Video ]

[ About ]
雨の夜。

Rainy night.

[ Source ]

#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) {};

	ofFbo fbo;

	void draw_tree(ofPoint point, float deg, int len, int depth);
};

#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) {};

ofFbo fbo;

void draw_tree(ofPoint point, float deg, int len, int depth);

};

#include "ofApp.h"

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

	ofSetFrameRate(24);
	ofBackground(0);
	ofSetWindowTitle("openFrameworks");

	ofSetCircleResolution(72);
	this->fbo.allocate(ofGetWidth(), ofGetHeight() / 2);
}

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

	ofSeedRandom(39);

	this->fbo.begin();
	ofClear(0);

	// Draw Sun To Fbo
	ofPushMatrix();
	ofTranslate(this->fbo.getWidth() / 3, this->fbo.getHeight() / 5 * 2);

	ofSetColor(255, 255, 0);
	ofDrawCircle(glm::vec3(), 100);

	ofPopMatrix();

	// Draw Rain
	ofSetColor(255);
	for (int i = 0; i < 50; i++) {

		int x = ofRandom(ofGetWidth());
		int y = (int)(ofRandom(this->fbo.getHeight()) + ofGetFrameNum() * ofRandom(10, 30)) % (int)this->fbo.getHeight();

		ofDrawLine(x, y, x, y + ofRandom(10, 30));
	}

	this->fbo.end();
}

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

	ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2);

	// Draw Fbo 
	ofSetColor(255, 255);
	this->fbo.draw(-ofGetWidth() / 2, -ofGetHeight() / 2);

	// Draw Shadow
	ofPixels pixels;
	this->fbo.readToPixels(pixels);

	for (int y = 0; y < pixels.getHeight(); y++) {

		int noise_x = ofMap(ofNoise(y * 0.05 + ofGetFrameNum() * 0.05), 0, 1, -20, 20);
		noise_x = noise_x * ofMap(y, 0, pixels.getHeight(), 1, 0.1);

		if (noise_x > 0) {

			for (int x = pixels.getWidth() - 1; x > noise_x; x--) {

				pixels.setColor(x, y, pixels.getColor(x - noise_x, y));
			}
			for (int x = 0; x < noise_x; x++) {

				pixels.setColor(x, y, ofColor(39));
			}
		}
		else if (noise_x < 0) {

			for (int x = 0; x < pixels.getWidth() + noise_x; x++) {

				pixels.setColor(x, y, pixels.getColor(x - noise_x, y));
			}
			for (int x = pixels.getWidth() + noise_x; x < pixels.getWidth(); x++) {

				pixels.setColor(x, y, ofColor(39));
			}
		}

	}
	ofImage image;
	image.setFromPixels(pixels);

	ofRotate(180);
	ofRotateY(180);
	ofSetColor(255, 64);
	image.draw(-ofGetWidth() / 2, -ofGetHeight() / 2);

	ofDrawLine(-360, 0, 360, 0);
}

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

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

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(24);

ofBackground(0);

ofSetWindowTitle("openFrameworks");

ofSetCircleResolution(72);

this->fbo.allocate(ofGetWidth(), ofGetHeight() / 2);

}

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

void ofApp::update() {

ofSeedRandom(39);

this->fbo.begin();

ofClear(0);

// Draw Sun To Fbo

ofPushMatrix();

ofTranslate(this->fbo.getWidth() / 3, this->fbo.getHeight() / 5 * 2);

ofSetColor(255, 255, 0);

ofDrawCircle(glm::vec3(), 100);

ofPopMatrix();

// Draw Rain

ofSetColor(255);

for (int i = 0; i < 50; i++) {

int x = ofRandom(ofGetWidth());

int y = (int)(ofRandom(this->fbo.getHeight()) + ofGetFrameNum() * ofRandom(10, 30)) % (int)this->fbo.getHeight();

ofDrawLine(x, y, x, y + ofRandom(10, 30));

}

this->fbo.end();

}

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

void ofApp::draw() {

ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2);

// Draw Fbo

ofSetColor(255, 255);

this->fbo.draw(-ofGetWidth() / 2, -ofGetHeight() / 2);

// Draw Shadow

ofPixels pixels;

this->fbo.readToPixels(pixels);

for (int y = 0; y < pixels.getHeight(); y++) {

int noise_x = ofMap(ofNoise(y * 0.05 + ofGetFrameNum() * 0.05), 0, 1, -20, 20);

noise_x = noise_x * ofMap(y, 0, pixels.getHeight(), 1, 0.1);

if (noise_x > 0) {

for (int x = pixels.getWidth() - 1; x > noise_x; x--) {

pixels.setColor(x, y, pixels.getColor(x - noise_x, y));

}

for (int x = 0; x < noise_x; x++) {

pixels.setColor(x, y, ofColor(39));

}

else if (noise_x < 0) {

for (int x = 0; x < pixels.getWidth() + noise_x; x++) {

pixels.setColor(x, y, pixels.getColor(x - noise_x, y));

}

for (int x = pixels.getWidth() + noise_x; x < pixels.getWidth(); x++) {

pixels.setColor(x, y, ofColor(39));

}

ofImage image;

image.setFromPixels(pixels);

ofRotate(180);

ofRotateY(180);

ofSetColor(255, 64);

image.draw(-ofGetWidth() / 2, -ofGetHeight() / 2);

ofDrawLine(-360, 0, 360, 0);

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

[ Link ]
https://github.com/junkiyoshi/Insta20220704

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