GLSL – ページ 19 – プログラミング de 落描き

2018年9月6日2018年9月6日

Split Font. openFrameworks

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openFrameworksからテキスチャとノイズの値をシェーダーに送信、フラグメントシェーダーで画面をスライド

Send the texture and noise value from openFramewoks to the shader. Shader split the image.

[ 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) {};

	ofFbo fbo;
	ofTrueTypeFont font;
	vector<float> y_noise;

	ofShader shader;
};

#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) {};

ofFbo fbo;

ofTrueTypeFont font;

vector<float> y_noise;

ofShader shader;

};

#include "ofApp.h"

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

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

	ofBackground(239);
	ofSetColor(39);

	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	this->font.loadFont("fonts/Kazesawa-bold.ttf", 180, true, true, true);

	for (int i = 0; i < ofGetHeight(); i++) 
	{
		this->y_noise.push_back(0.f); 
	}

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

	this->fbo.begin();
	ofClear(0);
	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);
	ofRotate(45);
	
	string word = "SPLIT";
	this->font.drawString(word, this->font.stringWidth(word) * -0.5, this->font.stringHeight(word) * 0.5);

	this->fbo.end();

	float noise_value;
	for (int y = 0; y < this->y_noise.size(); y++) {

		if (y % 10 == 0) { 
			
			noise_value = ofMap(ofNoise(y * 0.05, ofGetFrameNum() * 0.01), 0, 1, -1, 1);

			if (noise_value > 0.65) {

				noise_value -= 0.65;
			}
			else if (noise_value < -0.65) {

				noise_value += 0.65;
			}
			else {

				noise_value = 0.0;
			}
			
		}

		this->y_noise[y] = noise_value;
	}
}

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

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex", this->fbo.getTexture(), 1);
	this->shader.setUniform1fv("y_noise", &this->y_noise[0], ofGetHeight());

	ofDrawRectangle(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(60);

ofSetWindowTitle("openframeworks");

ofBackground(239);

ofSetColor(39);

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

this->font.loadFont("fonts/Kazesawa-bold.ttf", 180, true, true, true);

for (int i = 0; i < ofGetHeight(); i++)

{

this->y_noise.push_back(0.f);

}

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

}

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

void ofApp::update() {

this->fbo.begin();

ofClear(0);

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

ofRotate(45);

string word = "SPLIT";

this->font.drawString(word, this->font.stringWidth(word) * -0.5, this->font.stringHeight(word) * 0.5);

this->fbo.end();

float noise_value;

for (int y = 0; y < this->y_noise.size(); y++) {

if (y % 10 == 0) {

noise_value = ofMap(ofNoise(y * 0.05, ofGetFrameNum() * 0.01), 0, 1, -1, 1);

if (noise_value > 0.65) {

noise_value -= 0.65;

}

else if (noise_value < -0.65) {

noise_value += 0.65;

}

else {

noise_value = 0.0;

}

this->y_noise[y] = noise_value;

}

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

void ofApp::draw() {

this->shader.begin();

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

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

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

this->shader.setUniform1fv("y_noise", &this->y_noise[0], ofGetHeight());

ofDrawRectangle(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

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex;
uniform float y_noise[720];

out vec4 outputColor;

void main() {

  float drift = 360.0;
  vec4 t = texture(tex, vec2(gl_FragCoord.x + drift * y_noise[int(gl_FragCoord.y)], (resolution.y - gl_FragCoord.y)));
  outputColor = t;
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex;

uniform float y_noise[720];

out vec4 outputColor;

void main() {

float drift = 360.0;

vec4 t = texture(tex, vec2(gl_FragCoord.x + drift * y_noise[int(gl_FragCoord.y)], (resolution.y - gl_FragCoord.y)));

outputColor = t;

}

[ Link ]
https://github.com/junkiyoshi/Insta20180906

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2018年9月5日2018年9月5日

RGB DRIFT. openFrameworks

[ Video ]

[ About ]
ofFboに絵を描写してテキスチャとしてシェーダに送信、シェーダでピクセルずらし処理

Draw picture on ofFbo and send it to shader, pixel shift processing with shader.

[ 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) {};

	ofFbo fbo;
	ofTrueTypeFont font;

	glm::vec3 x_noise;
	glm::vec3 y_noise;

	ofShader shader;
};

#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) {};

ofFbo fbo;

ofTrueTypeFont font;

glm::vec3 x_noise;

glm::vec3 y_noise;

ofShader shader;

};

#include "ofApp.h"

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

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

	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	this->font.loadFont("fonts/Kazesawa-bold.ttf", 180, true, true, true);

	this->x_noise = glm::vec3(0.f, 0.f, 0.f);
	this->y_noise = glm::vec3(0.f, 0.f, 0.f);

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

	this->fbo.begin();
	ofClear(0);
	ofTranslate(ofGetWidth() * 0.5, ofGetHeight() * 0.5);

	ofSetColor(255);
	string word = "RGB";
	this->font.drawString(word, this->font.stringWidth(word) * -0.5, ofGetHeight() * -0.25 + this->font.stringHeight(word) * 0.5);
	word = "DRIFT";
	this->font.drawString(word, this->font.stringWidth(word) * -0.5, ofGetHeight() * 0.25 + this->font.stringHeight(word) * 0.5);

	this->fbo.end();

	ofSeedRandom(39);

	this->x_noise.r = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);
	this->x_noise.g = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);
	this->x_noise.b = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

	this->y_noise.r = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);
	this->y_noise.g = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);
	this->y_noise.b = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);
}

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

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex", this->fbo.getTexture(), 1);
	this->shader.setUniform3f("x_noise", this->x_noise);
	this->shader.setUniform3f("y_noise", this->y_noise);

	ofDrawRectangle(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(60);

ofSetWindowTitle("openframeworks");

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

this->font.loadFont("fonts/Kazesawa-bold.ttf", 180, true, true, true);

this->x_noise = glm::vec3(0.f, 0.f, 0.f);

this->y_noise = glm::vec3(0.f, 0.f, 0.f);

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

}

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

void ofApp::update() {

this->fbo.begin();

ofClear(0);

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

ofSetColor(255);

string word = "RGB";

this->font.drawString(word, this->font.stringWidth(word) * -0.5, ofGetHeight() * -0.25 + this->font.stringHeight(word) * 0.5);

word = "DRIFT";

this->font.drawString(word, this->font.stringWidth(word) * -0.5, ofGetHeight() * 0.25 + this->font.stringHeight(word) * 0.5);

this->fbo.end();

ofSeedRandom(39);

this->x_noise.r = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

this->x_noise.g = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

this->x_noise.b = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

this->y_noise.r = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

this->y_noise.g = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

this->y_noise.b = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.01), 0, 1, -1, 1);

}

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

void ofApp::draw() {

this->shader.begin();

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

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

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

this->shader.setUniform3f("x_noise", this->x_noise);

this->shader.setUniform3f("y_noise", this->y_noise);

ofDrawRectangle(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

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex;
uniform vec3 x_noise;
uniform vec3 y_noise;

out vec4 outputColor;

// 2D Random
float random (in vec2 st) {
    return fract(sin(dot(st.xy,
                         vec2(12.9898,78.233)))
                 * 43758.5453123);
}

// 2D Noise based on Morgan McGuire @morgan3d
// https://www.shadertoy.com/view/4dS3Wd
float noise (in vec2 st) {
    vec2 i = floor(st);
    vec2 f = fract(st);

    // Four corners in 2D of a tile
    float a = random(i);
    float b = random(i + vec2(1.0, 0.0));
    float c = random(i + vec2(0.0, 1.0));
    float d = random(i + vec2(1.0, 1.0));

    // Smooth Interpolation

    // Cubic Hermine Curve.  Same as SmoothStep()
    vec2 u = f*f*(3.0-2.0*f);
    // u = smoothstep(0.,1.,f);

    // Mix 4 coorners percentages
    return mix(a, b, u.x) +
            (c - a)* u.y * (1.0 - u.x) +
            (d - b) * u.x * u.y;
}

void main() {

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

  float drift = 60.0;
  float r = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.r, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.r)))).r;
  float g = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.g, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.g)))).g;
  float b = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.b, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.b)))).b;
  outputColor = vec4(r, g, b, 1.0);
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex;

uniform vec3 x_noise;

uniform vec3 y_noise;

out vec4 outputColor;

// 2D Random

float random (in vec2 st) {

return fract(sin(dot(st.xy,

vec2(12.9898,78.233)))

* 43758.5453123);

}

// 2D Noise based on Morgan McGuire @morgan3d

// https://www.shadertoy.com/view/4dS3Wd

float noise (in vec2 st) {

vec2 i = floor(st);

vec2 f = fract(st);

// Four corners in 2D of a tile

float a = random(i);

float b = random(i + vec2(1.0, 0.0));

float c = random(i + vec2(0.0, 1.0));

float d = random(i + vec2(1.0, 1.0));

// Smooth Interpolation

// Cubic Hermine Curve. Same as SmoothStep()

vec2 u = f*f*(3.0-2.0*f);

// u = smoothstep(0.,1.,f);

// Mix 4 coorners percentages

return mix(a, b, u.x) +

(c - a)* u.y * (1.0 - u.x) +

(d - b) * u.x * u.y;

}

void main() {

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

float drift = 60.0;

float r = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.r, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.r)))).r;

float g = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.g, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.g)))).g;

float b = texture(tex, vec2(gl_FragCoord.x + drift * noise(vec2(p.x + x_noise.b, p.y + time)), (resolution.y - gl_FragCoord.y) + drift * noise(vec2(p.x + time, p.y + y_noise.b)))).b;

outputColor = vec4(r, g, b, 1.0);

}

[ Link ]
https://github.com/junkiyoshi/Insta20180905

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2018年9月4日2018年9月4日

Face detection and image rotation. openFrameworks

[ Video ]

[ About ]
OpenCVで動画から顔を識別、テキスチャと顔の座標・サイズをシェーダに送信して加工

Face detection by OpenCV. Send texture and face coordinate / size to shader for processing.

[ 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(60);
	ofSetWindowTitle("openframeworks");

	this->cap.open("video.mp4");
	this->cap_size = cv::Size(1280, 720);

	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("opencv-3.4.1\\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);
	}

	cv::Mat src;
	this->cap >> src;
	if (src.empty()) {

		this->cap.set(CV_CAP_PROP_POS_FRAMES, 1);
		return;
	}
	else {

		cv::resize(src, this->frame, this->cap_size);
		cv::cvtColor(this->frame, this->frame, CV_BGR2RGB);
		this->image.update();
	}

	cv::Mat gray_frame, small_frame;
	cv::cvtColor(this->frame, gray_frame, CV_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(1280, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

this->cap.open("video.mp4");

this->cap_size = cv::Size(1280, 720);

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("opencv-3.4.1\\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);

}

cv::Mat src;

this->cap >> src;

if (src.empty()) {

this->cap.set(CV_CAP_PROP_POS_FRAMES, 1);

return;

}

else {

cv::resize(src, this->frame, this->cap_size);

cv::cvtColor(this->frame, this->frame, CV_BGR2RGB);

this->image.update();

}

cv::Mat gray_frame, small_frame;

cv::cvtColor(this->frame, gray_frame, CV_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(1280, 720);

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 * 5 + floor(d * 10) * 0.5) * d;
      float y = t.y + sin(a + time * 5 + floor(d * 10) * 0.5) * 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));
  outputColor = color;
}

#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 * 5 + floor(d * 10) * 0.5) * d;

float y = t.y + sin(a + time * 5 + floor(d * 10) * 0.5) * 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));

outputColor = color;

}

[ Link ]
https://github.com/junkiyoshi/Insta20180904

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