GLSL – ページ 7 – プログラミング de 落描き

2020年3月25日2020年3月25日

Glowing random walks. openFrameworks

[ Video ]

[ About ]
お互いに近づくと輝きを増すランダムウォーク。
光る処理はShaderを使用。

Random walks that shine as they get closer to each other.
Shader is used for the glowing process.

[ 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 mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	ofShader shader;
	int number_of_targets;
	vector<glm::vec4> location_list;
	vector<float> size_list;
};

#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 mouseEntered(int x, int y) {};

void mouseExited(int x, int y) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

ofShader shader;

int number_of_targets;

vector<glm::vec4> location_list;

vector<float> size_list;

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openframeworks");

	this->number_of_targets = 65;
	this->shader.load("shader/shader.vert", "shader/shader.frag");
}
//--------------------------------------------------------------
void ofApp::update() {

	ofSeedRandom(39);

	this->location_list.clear();
	this->size_list.clear();

	for (int i = 0; i < this->number_of_targets; i++) {

		auto location = glm::vec4(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, 0, ofGetWidth()), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, 0, ofGetHeight()), 0, 0);
		this->location_list.push_back(location);
		this->size_list.push_back(0.1);
	}

	for (int i = 0; i < this->number_of_targets; i++) {

		for (int k = i + 1; k < this->number_of_targets; k++) {

			auto distance = glm::distance(this->location_list[i], this->location_list[k]);
			if (distance < 50) {

				this->size_list[i] += 0.25;
				this->size_list[k] += 0.25;
			}
		}
	}
}

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

	this->shader.begin();

	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniform4fv("targets", &this->location_list[0].x, this->number_of_targets);
	this->shader.setUniform1fv("sizes", &this->size_list[0], this->number_of_targets);
	ofRect(0, 0, ofGetWidth(), ofGetHeight());

	this->shader.end();
}

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

	ofGLWindowSettings settings;
	settings.setGLVersion(3, 2);
	settings.setSize(720, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

this->number_of_targets = 65;

this->shader.load("shader/shader.vert", "shader/shader.frag");

}

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

void ofApp::update() {

ofSeedRandom(39);

this->location_list.clear();

this->size_list.clear();

for (int i = 0; i < this->number_of_targets; i++) {

auto location = glm::vec4(ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, 0, ofGetWidth()), ofMap(ofNoise(ofRandom(1000), ofGetFrameNum() * 0.005), 0, 1, 0, ofGetHeight()), 0, 0);

this->location_list.push_back(location);

this->size_list.push_back(0.1);

}

for (int i = 0; i < this->number_of_targets; i++) {

for (int k = i + 1; k < this->number_of_targets; k++) {

auto distance = glm::distance(this->location_list[i], this->location_list[k]);

if (distance < 50) {

this->size_list[i] += 0.25;

this->size_list[k] += 0.25;

}

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

void ofApp::draw() {

this->shader.begin();

this->shader.setUniform1f("time", ofGetElapsedTimef());

this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());

this->shader.setUniform4fv("targets", &this->location_list[0].x, this->number_of_targets);

this->shader.setUniform1fv("sizes", &this->size_list[0], this->number_of_targets);

ofRect(0, 0, ofGetWidth(), ofGetHeight());

this->shader.end();

}

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

int main() {

ofGLWindowSettings settings;

settings.setGLVersion(3, 2);

settings.setSize(720, 720);

ofCreateWindow(settings);

ofRunApp(new ofApp());

}

#version 150

uniform mat4 modelViewProjectionMatrix;
in vec4 position;

void main(){
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

void main(){

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

const int number_of_targets = 65;

out vec4 outputColor;
uniform float time;
uniform vec2 resolution;
uniform vec4 targets[number_of_targets];
uniform float sizes[number_of_targets];

void main() {

  vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);
  vec3 color = vec3(0.0);
  for(int i = 0; i < number_of_targets; i++){

    vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;
    t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

    float r = 0.03 / length(p - t) * sizes[i];
    vec3 c = vec3(smoothstep(0.03, 1.0, r), smoothstep(0.03, 1.0, r), smoothstep(0.03, 1.0, r));
    color += c;
  }

  outputColor = vec4(color, 1.0);
}

#version 150

const int number_of_targets = 65;

out vec4 outputColor;

uniform float time;

uniform vec2 resolution;

uniform vec4 targets[number_of_targets];

uniform float sizes[number_of_targets];

void main() {

vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

vec3 color = vec3(0.0);

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

vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;

t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

float r = 0.03 / length(p - t) * sizes[i];

vec3 c = vec3(smoothstep(0.03, 1.0, r), smoothstep(0.03, 1.0, r), smoothstep(0.03, 1.0, r));

color += c;

}

outputColor = vec4(color, 1.0);

}

[ Link ]
https://github.com/junkiyoshi/Insta20200325

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2020年2月9日

From Reona396 workshop. openFrameworks

[ Video ]

[ About ]
PCD Tokyo 2020 のレオナさん・ワークショップより(アシスタント版)

From Reona396 workshop on PCD Tokyo 2020.

[ 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 mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	glm::vec2 make_point(int len, int param);

	ofShader shader;
	ofFbo fbo;
};

#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 mouseEntered(int x, int y) {};

void mouseExited(int x, int y) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

glm::vec2 make_point(int len, int param);

ofShader shader;

ofFbo fbo;

};

#include "ofApp.h"

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

	ofSetFrameRate(60);
	ofSetWindowTitle("openframeworks");

	ofBackground(255);
	ofSetColor(0);

	this->shader.load("shader/shader.vert", "shader/shader.frag");
	this->fbo.allocate(ofGetWidth(), ofGetHeight());
}
//--------------------------------------------------------------
void ofApp::update() {

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

	vector<glm::vec2> right, left;
	for (auto param = 0; param <= 50; param++) {

		auto noise_value = ofNoise(param * 0.08, ofGetFrameNum() * 0.005);

		if (noise_value < 0.65) {

			right.push_back(this->make_point(720, param) + glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5));
			left.push_back(this->make_point(720, 100 - param) + glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5));
		}
		else {

			if (right.size() > 0 && left.size() > 0) {

				reverse(left.begin(), left.end());
				ofBeginShape();
				ofVertices(right);
				ofVertices(left);
				ofEndShape(true);

				right.clear();
				left.clear();
			}
		}
	}

	if (right.size() > 0 && left.size() > 0) {

		reverse(left.begin(), left.end());
		ofBeginShape();
		ofVertices(right);
		ofVertices(left);
		ofEndShape(true);
	}

	this->fbo.end();
}

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

	vector<glm::vec2> targets;
	for (int i = 0; i < 100; i++) {

		float R = 180 + 90 * abs(sin((i * 100 + ofGetFrameNum() + i) * DEG_TO_RAD));
		float x = R * cos((360 * i / 100 + ofGetFrameNum() * 0.15) * DEG_TO_RAD);
		float y = R * sin((360 * i / 100 + ofGetFrameNum() * 0.15) * DEG_TO_RAD);

		targets.push_back(glm::vec2(x, y) + glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5));
	}

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniform2fv("targets", &targets[0].x, targets.size());
	this->shader.setUniformTexture("tex", this->fbo.getTexture(), 1);

	ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight());

	this->shader.end();
}

//--------------------------------------------------------------
glm::vec2 ofApp::make_point(int len, int param) {

	param = param % 100;
	if (param < 25) {

		return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5);
	}
	else if (param < 50) {

		return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5));
	}
	else if (param < 75) {

		return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5);
	}
	else {

		return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5));
	}
}

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

	ofGLWindowSettings settings;
	settings.setGLVersion(3, 2);
	settings.setSize(720, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(255);

ofSetColor(0);

this->shader.load("shader/shader.vert", "shader/shader.frag");

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

}

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

void ofApp::update() {

this->fbo.begin();

ofClear(0);

vector<glm::vec2> right, left;

for (auto param = 0; param <= 50; param++) {

auto noise_value = ofNoise(param * 0.08, ofGetFrameNum() * 0.005);

if (noise_value < 0.65) {

right.push_back(this->make_point(720, param) + glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5));

left.push_back(this->make_point(720, 100 - param) + glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5));

}

else {

if (right.size() > 0 && left.size() > 0) {

reverse(left.begin(), left.end());

ofBeginShape();

ofVertices(right);

ofVertices(left);

ofEndShape(true);

right.clear();

left.clear();

}

if (right.size() > 0 && left.size() > 0) {

reverse(left.begin(), left.end());

ofBeginShape();

ofVertices(right);

ofVertices(left);

ofEndShape(true);

}

this->fbo.end();

}

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

void ofApp::draw() {

vector<glm::vec2> targets;

for (int i = 0; i < 100; i++) {

float R = 180 + 90 * abs(sin((i * 100 + ofGetFrameNum() + i) * DEG_TO_RAD));

float x = R * cos((360 * i / 100 + ofGetFrameNum() * 0.15) * DEG_TO_RAD);

float y = R * sin((360 * i / 100 + ofGetFrameNum() * 0.15) * DEG_TO_RAD);

targets.push_back(glm::vec2(x, y) + glm::vec2(ofGetWidth() * 0.5, ofGetHeight() * 0.5));

}

this->shader.begin();

this->shader.setUniform1f("time", ofGetElapsedTimef());

this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());

this->shader.setUniform2fv("targets", &targets[0].x, targets.size());

this->shader.setUniformTexture("tex", this->fbo.getTexture(), 1);

ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight());

this->shader.end();

}

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

glm::vec2 ofApp::make_point(int len, int param) {

param = param % 100;

if (param < 25) {

return glm::vec2(ofMap(param, 0, 25, -len * 0.5, len * 0.5), -len * 0.5);

}

else if (param < 50) {

return glm::vec2(len * 0.5, ofMap(param, 25, 50, -len * 0.5, len * 0.5));

}

else if (param < 75) {

return glm::vec2(ofMap(param, 50, 75, len * 0.5, -len * 0.5), len * 0.5);

}

else {

return glm::vec2(-len * 0.5, ofMap(param, 75, 100, len * 0.5, -len * 0.5));

}

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

int main() {

ofGLWindowSettings settings;

settings.setGLVersion(3, 2);

settings.setSize(720, 720);

ofCreateWindow(settings);

ofRunApp(new ofApp());

}

#version 150

uniform mat4 modelViewProjectionMatrix;
in vec4 position;

void main(){
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

void main(){

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

const int number_of_targets = 100;

uniform float time;
uniform vec2 resolution;
uniform vec2 targets[number_of_targets];
uniform sampler2DRect tex;

out vec4 outputColor;

void main() {

  vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);
  vec4 tx = texture(tex, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));
  vec3 color = vec3(1.0 - tx.a);
 
  for(int i = 0; i < number_of_targets; i++){

    vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;
    t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

	vec3 v = vec3(smoothstep(0.05, 1.0, 0.0165 / length(p - t)));
	color += ((tx.a == 0) ? -v : v);
  }

  outputColor = vec4(color, 1.0);
}

#version 150

const int number_of_targets = 100;

uniform float time;

uniform vec2 resolution;

uniform vec2 targets[number_of_targets];

uniform sampler2DRect tex;

out vec4 outputColor;

void main() {

vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

vec4 tx = texture(tex, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

vec3 color = vec3(1.0 - tx.a);

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

vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;

t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

vec3 v = vec3(smoothstep(0.05, 1.0, 0.0165 / length(p - t)));

color += ((tx.a == 0) ? -v : v);

}

outputColor = vec4(color, 1.0);

}

[ Link ]
https://github.com/junkiyoshi/Insta20200209

[ほしいものリスト]
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2019年12月29日

Round the face. openFrameworks

[ Video ]

[ About ]
OpenCVで顔を検出して、Shaderで画像処理。

Round the face.

[ Source ]

#pragma once
#include "ofMain.h"
#include <opencv2/opencv.hpp>

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 mouseEntered(int x, int y) {};
	void mouseExited(int x, int y) {};
	void windowResized(int w, int h) {};
	void dragEvent(ofDragInfo dragInfo) {};
	void gotMessage(ofMessage msg) {};

	cv::Size cap_size;
	cv::VideoCapture cap;
	cv::Mat frame;
	ofImage image;

	cv::CascadeClassifier face_cascade;

	int number_of_targets;
	vector<glm::vec4> targets;
	vector<glm::vec4> sizes;

	ofShader shader;
};

#pragma once

#include "ofMain.h"

#include <opencv2/opencv.hpp>

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 mouseEntered(int x, int y) {};

void mouseExited(int x, int y) {};

void windowResized(int w, int h) {};

void dragEvent(ofDragInfo dragInfo) {};

void gotMessage(ofMessage msg) {};

cv::Size cap_size;

cv::VideoCapture cap;

cv::Mat frame;

ofImage image;

cv::CascadeClassifier face_cascade;

int number_of_targets;

vector<glm::vec4> targets;

vector<glm::vec4> sizes;

ofShader shader;

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("openframeworks");

	this->cap_size = cv::Size(640, 360);

	this->cap.open(0);
	this->cap.set(cv::CAP_PROP_FPS, 30);
	this->cap.set(cv::CAP_PROP_FRAME_WIDTH, this->cap_size.width);
	this->cap.set(cv::CAP_PROP_FRAME_HEIGHT, this->cap_size.height);

	this->image.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);
	this->frame = cv::Mat(cv::Size(this->image.getWidth(), this->image.getHeight()), CV_MAKETYPE(CV_8UC3, this->image.getPixels().getNumChannels()), this->image.getPixels().getData(), 0);

	this->number_of_targets = 2;
	for (int i = 0; i < this->number_of_targets; i++) {

		this->targets.push_back(glm::vec4(0.f, 0.f, 0.f, 0.f));
		this->sizes.push_back(glm::vec4(0.f, 0.f, 0.f, 0.f));
	}

	this->face_cascade.load("D:\\opencv_4.1.2\\build\\install\\etc\\haarcascades\\haarcascade_frontalface_alt2.xml");
	this->shader.load("shader/shader.vert", "shader/shader.frag");
}
//--------------------------------------------------------------
void ofApp::update() {

	for (int i = 0; i < this->number_of_targets; i++) {

		this->targets[i] = glm::vec4(0.f, 0.f, 0.f, 0.f);
		this->sizes[i] = glm::vec4(0.f, 0.f, 0.f, 0.f);
	}

	this->cap >> this->frame;
	cv::cvtColor(this->frame, this->frame, cv::COLOR_BGR2RGB);
	this->image.update();

	cv::Mat gray_frame, small_frame;
	cv::cvtColor(this->frame, gray_frame, cv::COLOR_RGB2GRAY);
	cv::resize(gray_frame, small_frame, cv::Size(this->cap_size.width * 0.5, this->cap_size.height * 0.5));

	vector<cv::Rect> faces;
	this->face_cascade.detectMultiScale(small_frame, faces);

	int face_count = 0;
	for (cv::Rect r : faces) {

		this->targets[face_count] = glm::vec4(r.x * 2.f + r.width, r.y * 2.f + r.height, 0.f, 0.f);
		float value = r.width < r.height ? r.width : r.height;
		this->sizes[face_count] = glm::vec4(value, value, 0.f, 0.f);
		face_count++;

		if (face_count >= this->number_of_targets) {

			break;
		}
	}
}

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

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex", this->image, 1);
	this->shader.setUniform4fv("targets", &this->targets[0].x, this->number_of_targets);
	this->shader.setUniform4fv("sizes", &this->sizes[0].x, this->number_of_targets);

	ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight());

	this->shader.end();
}

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

	ofGLWindowSettings settings;
	settings.setGLVersion(3, 2);
	settings.setSize(640, 360);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("openframeworks");

this->cap_size = cv::Size(640, 360);

this->cap.open(0);

this->cap.set(cv::CAP_PROP_FPS, 30);

this->cap.set(cv::CAP_PROP_FRAME_WIDTH, this->cap_size.width);

this->cap.set(cv::CAP_PROP_FRAME_HEIGHT, this->cap_size.height);

this->image.allocate(this->cap_size.width, this->cap_size.height, OF_IMAGE_COLOR);

this->frame = cv::Mat(cv::Size(this->image.getWidth(), this->image.getHeight()), CV_MAKETYPE(CV_8UC3, this->image.getPixels().getNumChannels()), this->image.getPixels().getData(), 0);

this->number_of_targets = 2;

for (int i = 0; i < this->number_of_targets; i++) {

this->targets.push_back(glm::vec4(0.f, 0.f, 0.f, 0.f));

this->sizes.push_back(glm::vec4(0.f, 0.f, 0.f, 0.f));

}

this->face_cascade.load("D:\\opencv_4.1.2\\build\\install\\etc\\haarcascades\\haarcascade_frontalface_alt2.xml");

this->shader.load("shader/shader.vert", "shader/shader.frag");

}

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

void ofApp::update() {

for (int i = 0; i < this->number_of_targets; i++) {

this->targets[i] = glm::vec4(0.f, 0.f, 0.f, 0.f);

this->sizes[i] = glm::vec4(0.f, 0.f, 0.f, 0.f);

}

this->cap >> this->frame;

cv::cvtColor(this->frame, this->frame, cv::COLOR_BGR2RGB);

this->image.update();

cv::Mat gray_frame, small_frame;

cv::cvtColor(this->frame, gray_frame, cv::COLOR_RGB2GRAY);

cv::resize(gray_frame, small_frame, cv::Size(this->cap_size.width * 0.5, this->cap_size.height * 0.5));

vector<cv::Rect> faces;

this->face_cascade.detectMultiScale(small_frame, faces);

int face_count = 0;

for (cv::Rect r : faces) {

this->targets[face_count] = glm::vec4(r.x * 2.f + r.width, r.y * 2.f + r.height, 0.f, 0.f);

float value = r.width < r.height ? r.width : r.height;

this->sizes[face_count] = glm::vec4(value, value, 0.f, 0.f);

face_count++;

if (face_count >= this->number_of_targets) {

break;

}

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

void ofApp::draw() {

this->shader.begin();

this->shader.setUniform1f("time", ofGetElapsedTimef());

this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());

this->shader.setUniformTexture("tex", this->image, 1);

this->shader.setUniform4fv("targets", &this->targets[0].x, this->number_of_targets);

this->shader.setUniform4fv("sizes", &this->sizes[0].x, this->number_of_targets);

ofDrawRectangle(0, 0, ofGetWidth(), ofGetHeight());

this->shader.end();

}

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

int main() {

ofGLWindowSettings settings;

settings.setGLVersion(3, 2);

settings.setSize(640, 360);

ofCreateWindow(settings);

ofRunApp(new ofApp());

}

#version 150

uniform mat4 modelViewProjectionMatrix;
in vec4 position;
in vec2 texcoord;
out vec2 texCoordVarying;

void main(){

	texCoordVarying = texcoord;
	gl_Position = modelViewProjectionMatrix * position;
}

#version 150

uniform mat4 modelViewProjectionMatrix;

in vec4 position;

in vec2 texcoord;

out vec2 texCoordVarying;

void main(){

texCoordVarying = texcoord;

gl_Position = modelViewProjectionMatrix * position;

}

#version 150

const int number_of_targets = 2;

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex;
uniform vec4 targets[number_of_targets];
uniform vec4 sizes[number_of_targets];

in vec2 texCoordVarying;
out vec4 outputColor;

void main() {

  vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

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

    vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;
    t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

    vec2 sz = vec2(sizes[i].x, -sizes[i].y) / min(resolution.x, resolution.y) * 2.0;

    vec2 q = p - t;
    float d = length(q);
    if(d < length(sz)){

      float a = atan(q.y, q.x);
      float x = t.x + cos(a + time * 3 + d * 15) * d;
      float y = t.y + sin(a + time * 3 + d * 15) * d;
      p = vec2(x, y);
    }
  }

  vec4 color = texture(tex, vec2((p.x * min(resolution.x, resolution.y) + resolution.x) * 0.5, resolution.y - (p.y * min(resolution.x, resolution.y) + resolution.y) * 0.5));
  
  float mono = dot(color.rgb, vec3(1.0/3.0));
  outputColor = vec4(vec3(mono), color.a);

}

#version 150

const int number_of_targets = 2;

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex;

uniform vec4 targets[number_of_targets];

uniform vec4 sizes[number_of_targets];

in vec2 texCoordVarying;

out vec4 outputColor;

void main() {

vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);

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

vec2 t = vec2(targets[i].x, -targets[i].y) / min(resolution.x, resolution.y) * 2.0;

t.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

vec2 sz = vec2(sizes[i].x, -sizes[i].y) / min(resolution.x, resolution.y) * 2.0;

vec2 q = p - t;

float d = length(q);

if(d < length(sz)){

float a = atan(q.y, q.x);

float x = t.x + cos(a + time * 3 + d * 15) * d;

float y = t.y + sin(a + time * 3 + d * 15) * d;

p = vec2(x, y);

}

vec4 color = texture(tex, vec2((p.x * min(resolution.x, resolution.y) + resolution.x) * 0.5, resolution.y - (p.y * min(resolution.x, resolution.y) + resolution.y) * 0.5));

float mono = dot(color.rgb, vec3(1.0/3.0));

outputColor = vec4(vec3(mono), color.a);

}

[ Link ]
https://github.com/junkiyoshi/Insta20191229

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