RGB DRIFT. openFrameworks – プログラミング de 落描き

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[ 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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