openFrameworks wires

ofApp.cpp

#include "ofApp.h"

void lineThroughPoint(const glm::vec2 &i, float slope, glm::vec2 &p1, glm::vec2 &p2) {
	float x1 = i.x - i.y / slope;
	float x2 = i.x + (ofGetHeight() - i.y) / slope;
	p1.x = x1; p1.y = 0;
	p2.x = x2; p2.y = ofGetHeight();
}

void drawRandomLine(const glm::vec2 &focus) {
	glm::vec2 p(ofRandomWidth(), ofRandomHeight());
	glm::vec2 slope = glm::normalize(p - focus);
	{ float temp = slope.x; slope.x = -slope.y; slope.y = temp; }
	float add = ofRandomf() * 0.8;
	float newSlope = (slope.y + add) / (slope.x + add);

	glm::vec2 p1, p2;
	lineThroughPoint(p, newSlope, p1, p2);
	ofDrawLine(p1, p2);
}

void drawWiresAround(glm::vec2 focus, size_t n) {
	for (size_t i = 0; i < n; i++) {
		drawRandomLine(focus);
	}
}

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

void ofApp::draw() {
	ofBackgroundGradient(ofColor(200, 120, 0), ofColor::black, OF_GRADIENT_CIRCULAR);
	glm::vec2 focus(ofGetMouseX(), ofGetMouseY());
	drawWiresAround(focus, 2000);
}