font – ページ 61 – プログラミング de 落描き

2018年10月19日2018年10月19日

Random walk in A. openFrameworks

[ Video ]

[ About ]
文字の座標にZ軸を加えて文字の中を右往左往

Random walk in A.

[ Source ]

#pragma once
#include "ofMain.h"
#include "Particle.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) {};

	ofEasyCam cam;
	ofFbo fbo;
	vector<Particle> particles;

	vector<ofPoint> locations;
	vector<vector<int>> next_indexes;
};

#pragma once

#include "ofMain.h"

#include "Particle.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) {};

ofEasyCam cam;

ofFbo fbo;

vector<Particle> particles;

vector<ofPoint> locations;

vector<vector<int>> next_indexes;

};

#include "ofApp.h"

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

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

	ofBackground(39);
	ofSetColor(239);
	ofEnableDepthTest();

	ofTrueTypeFont font;
	int font_size = 350;
	font.loadFont("fonts/Kazesawa-Bold.ttf", font_size, true, true, true);

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

	string word = "A";
	font.drawString(word, font.stringWidth(word) * -0.5, font.stringHeight(word) * 0.5);

	this->fbo.end();

	ofPixels pixels;
	this->fbo.readToPixels(pixels);

	int span = 10;

	ofColor pix_color;
	for (int x = 0; x < this->fbo.getWidth(); x += span) {

		for (int y = 0; y < this->fbo.getHeight(); y += span) {

			pix_color = pixels.getColor(x, y);
			if (pix_color != ofColor(0, 0)) {

				for (int z = span * -2; z <= span * 2; z += span) {

					this->locations.push_back(ofPoint(x - ofGetWidth() * 0.5, y - ofGetHeight() * 0.5, z));
				}
			}
		}
	}

	for (int i = 0; i < this->locations.size(); i++) {

		vector<int> next_index = vector<int>();
		for (int j = 0; j < this->locations.size(); j++) {

			if (i == j) { continue; }

			float distance = this->locations[i].distance(this->locations[j]);
			if (distance <= span) {

				next_index.push_back(j);
			}
		}

		this->next_indexes.push_back(next_index);
	}

	for (int i = 0; i < 500; i++) { this->particles.push_back(Particle(this->locations, this->next_indexes)); }
}
//--------------------------------------------------------------
void ofApp::update() {

	for (Particle& particle : particles) { particle.Upate(); }
}

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

	this->cam.begin();
	ofRotateX(180);
	ofRotateY(ofGetFrameNum() * -0.5);

	for (Particle& particle : particles) { particle.Draw(); }

	this->cam.end();
}

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

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

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofBackground(39);

ofSetColor(239);

ofEnableDepthTest();

ofTrueTypeFont font;

int font_size = 350;

font.loadFont("fonts/Kazesawa-Bold.ttf", font_size, true, true, true);

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

this->fbo.begin();

ofClear(0);

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

string word = "A";

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

this->fbo.end();

ofPixels pixels;

this->fbo.readToPixels(pixels);

int span = 10;

ofColor pix_color;

for (int x = 0; x < this->fbo.getWidth(); x += span) {

for (int y = 0; y < this->fbo.getHeight(); y += span) {

pix_color = pixels.getColor(x, y);

if (pix_color != ofColor(0, 0)) {

for (int z = span * -2; z <= span * 2; z += span) {

this->locations.push_back(ofPoint(x - ofGetWidth() * 0.5, y - ofGetHeight() * 0.5, z));

}

for (int i = 0; i < this->locations.size(); i++) {

vector<int> next_index = vector<int>();

for (int j = 0; j < this->locations.size(); j++) {

if (i == j) { continue; }

float distance = this->locations[i].distance(this->locations[j]);

if (distance <= span) {

next_index.push_back(j);

}

this->next_indexes.push_back(next_index);

}

for (int i = 0; i < 500; i++) { this->particles.push_back(Particle(this->locations, this->next_indexes)); }

}

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

void ofApp::update() {

for (Particle& particle : particles) { particle.Upate(); }

}

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

void ofApp::draw() {

this->cam.begin();

ofRotateX(180);

ofRotateY(ofGetFrameNum() * -0.5);

for (Particle& particle : particles) { particle.Draw(); }

this->cam.end();

}

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

int main() {

ofSetupOpenGL(720, 720, OF_WINDOW);

ofRunApp(new ofApp());

}

#pragma once
#include "ofMain.h"

class Particle {
public:
	Particle(vector<ofPoint> locations, vector<vector<int>> next_indexes);
	~Particle();
	void Upate();
	void Draw();

	ofPoint location;
private:

	vector<ofPoint> locations;
	vector<vector<int>> next_indexes;

	int locations_index;
	int next_index;

	std::deque<ofPoint> logs;
};

#pragma once

#include "ofMain.h"

class Particle {

public:

Particle(vector<ofPoint> locations, vector<vector<int>> next_indexes);

~Particle();

void Upate();

void Draw();

ofPoint location;

private:

vector<ofPoint> locations;

vector<vector<int>> next_indexes;

int locations_index;

int next_index;

std::deque<ofPoint> logs;

};

#include "Particle.h"

//--------------------------------------------------------------
Particle::Particle(vector<ofPoint> locations, vector<vector<int>> next_indexes) {

	this->locations = locations;
	this->next_indexes = next_indexes;
	this->locations_index = (int)ofRandom(this->locations.size());
	this->next_index = this->next_indexes[this->locations_index][(int)ofRandom(this->next_indexes[this->locations_index].size())];
}

//--------------------------------------------------------------
Particle::~Particle() {

}

//--------------------------------------------------------------
void Particle::Upate() {

	int frame_span = 20;

	if (ofGetFrameNum() % frame_span == 0) {

		this->locations_index = this->next_index;
		this->next_index = this->next_indexes[this->locations_index][(int)ofRandom(this->next_indexes[this->locations_index].size())];
	}

	ofPoint distance = this->locations[this->next_index] - this->locations[this->locations_index];
	this->location = this->locations[this->locations_index] + distance / frame_span * (ofGetFrameNum() % frame_span);

	this->logs.push_front(this->location);
	while (this->logs.size() > 45) { this->logs.pop_back(); }
}

//--------------------------------------------------------------
void Particle::Draw() {

	ofFill();
	ofDrawSphere(this->location, 1);

	ofNoFill();
	ofBeginShape();
	for (ofPoint& log : this->logs) {

		ofVertex(log);
	}
	ofEndShape();
}

#include "Particle.h"

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

Particle::Particle(vector<ofPoint> locations, vector<vector<int>> next_indexes) {

this->locations = locations;

this->next_indexes = next_indexes;

this->locations_index = (int)ofRandom(this->locations.size());

this->next_index = this->next_indexes[this->locations_index][(int)ofRandom(this->next_indexes[this->locations_index].size())];

}

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

Particle::~Particle() {

}

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

void Particle::Upate() {

int frame_span = 20;

if (ofGetFrameNum() % frame_span == 0) {

this->locations_index = this->next_index;

this->next_index = this->next_indexes[this->locations_index][(int)ofRandom(this->next_indexes[this->locations_index].size())];

}

ofPoint distance = this->locations[this->next_index] - this->locations[this->locations_index];

this->location = this->locations[this->locations_index] + distance / frame_span * (ofGetFrameNum() % frame_span);

this->logs.push_front(this->location);

while (this->logs.size() > 45) { this->logs.pop_back(); }

}

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

void Particle::Draw() {

ofFill();

ofDrawSphere(this->location, 1);

ofNoFill();

ofBeginShape();

for (ofPoint& log : this->logs) {

ofVertex(log);

}

ofEndShape();

}

[ Link ]
https://github.com/junkiyoshi/Insta20181019

2018年9月14日2018年9月14日

SCATTER. openframeworks

[ Video ]

[ About ]
GLSL Tech Night 2018で聞いてきた事を試してみた。Noiseで文字をずらし + expで減衰。

I tried what I heard at “GLSL Tech Night 2018”.

[ 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;

	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;

ofShader shader;

};

#include "ofApp.h"

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

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

	this->font.loadFont("fonts/Kazesawa-bold.ttf", 180, true, true, true);
	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	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 = "SCATTER";
	this->font.drawString(word, this->font.stringWidth(word) * -0.5, this->font.stringHeight(word) * 0.5);

	this->fbo.end();
}

//--------------------------------------------------------------
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);

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

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

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 = "SCATTER";

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

this->fbo.end();

}

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

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);

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;

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;

out vec4 outputColor;

//
// Description : Array and textureless GLSL 2D/3D/4D simplex
//               noise functions.
//      Author : Ian McEwan, Ashima Arts.
//  Maintainer : stegu
//     Lastmod : 20110822 (ijm)
//     License : Copyright (C) 2011 Ashima Arts. All rights reserved.
//               Distributed under the MIT License. See LICENSE file.
//               https://github.com/ashima/webgl-noise
//               https://github.com/stegu/webgl-noise
//

vec4 mod289(vec4 x) {
  return x - floor(x * (1.0 / 289.0)) * 289.0; }

float mod289(float x) {
  return x - floor(x * (1.0 / 289.0)) * 289.0; }

vec4 permute(vec4 x) {
     return mod289(((x*34.0)+1.0)*x);
}

float permute(float x) {
     return mod289(((x*34.0)+1.0)*x);
}

vec4 taylorInvSqrt(vec4 r)
{
  return 1.79284291400159 - 0.85373472095314 * r;
}

float taylorInvSqrt(float r)
{
  return 1.79284291400159 - 0.85373472095314 * r;
}

vec4 grad4(float j, vec4 ip)
  {
  const vec4 ones = vec4(1.0, 1.0, 1.0, -1.0);
  vec4 p,s;

  p.xyz = floor( fract (vec3(j) * ip.xyz) * 7.0) * ip.z - 1.0;
  p.w = 1.5 - dot(abs(p.xyz), ones.xyz);
  s = vec4(lessThan(p, vec4(0.0)));
  p.xyz = p.xyz + (s.xyz*2.0 - 1.0) * s.www;

  return p;
  }

// (sqrt(5) - 1)/4 = F4, used once below
#define F4 0.309016994374947451

float snoise(vec4 v)
  {
  const vec4  C = vec4( 0.138196601125011,  // (5 - sqrt(5))/20  G4
                        0.276393202250021,  // 2 * G4
                        0.414589803375032,  // 3 * G4
                       -0.447213595499958); // -1 + 4 * G4

// First corner
  vec4 i  = floor(v + dot(v, vec4(F4)) );
  vec4 x0 = v -   i + dot(i, C.xxxx);

// Other corners

// Rank sorting originally contributed by Bill Licea-Kane, AMD (formerly ATI)
  vec4 i0;
  vec3 isX = step( x0.yzw, x0.xxx );
  vec3 isYZ = step( x0.zww, x0.yyz );
//  i0.x = dot( isX, vec3( 1.0 ) );
  i0.x = isX.x + isX.y + isX.z;
  i0.yzw = 1.0 - isX;
//  i0.y += dot( isYZ.xy, vec2( 1.0 ) );
  i0.y += isYZ.x + isYZ.y;
  i0.zw += 1.0 - isYZ.xy;
  i0.z += isYZ.z;
  i0.w += 1.0 - isYZ.z;

  // i0 now contains the unique values 0,1,2,3 in each channel
  vec4 i3 = clamp( i0, 0.0, 1.0 );
  vec4 i2 = clamp( i0-1.0, 0.0, 1.0 );
  vec4 i1 = clamp( i0-2.0, 0.0, 1.0 );

  //  x0 = x0 - 0.0 + 0.0 * C.xxxx
  //  x1 = x0 - i1  + 1.0 * C.xxxx
  //  x2 = x0 - i2  + 2.0 * C.xxxx
  //  x3 = x0 - i3  + 3.0 * C.xxxx
  //  x4 = x0 - 1.0 + 4.0 * C.xxxx
  vec4 x1 = x0 - i1 + C.xxxx;
  vec4 x2 = x0 - i2 + C.yyyy;
  vec4 x3 = x0 - i3 + C.zzzz;
  vec4 x4 = x0 + C.wwww;

// Permutations
  i = mod289(i);
  float j0 = permute( permute( permute( permute(i.w) + i.z) + i.y) + i.x);
  vec4 j1 = permute( permute( permute( permute (
             i.w + vec4(i1.w, i2.w, i3.w, 1.0 ))
           + i.z + vec4(i1.z, i2.z, i3.z, 1.0 ))
           + i.y + vec4(i1.y, i2.y, i3.y, 1.0 ))
           + i.x + vec4(i1.x, i2.x, i3.x, 1.0 ));

// Gradients: 7x7x6 points over a cube, mapped onto a 4-cross polytope
// 7*7*6 = 294, which is close to the ring size 17*17 = 289.
  vec4 ip = vec4(1.0/294.0, 1.0/49.0, 1.0/7.0, 0.0) ;

  vec4 p0 = grad4(j0,   ip);
  vec4 p1 = grad4(j1.x, ip);
  vec4 p2 = grad4(j1.y, ip);
  vec4 p3 = grad4(j1.z, ip);
  vec4 p4 = grad4(j1.w, ip);

// Normalise gradients
  vec4 norm = taylorInvSqrt(vec4(dot(p0,p0), dot(p1,p1), dot(p2, p2), dot(p3,p3)));
  p0 *= norm.x;
  p1 *= norm.y;
  p2 *= norm.z;
  p3 *= norm.w;
  p4 *= taylorInvSqrt(dot(p4,p4));

// Mix contributions from the five corners
  vec3 m0 = max(0.6 - vec3(dot(x0,x0), dot(x1,x1), dot(x2,x2)), 0.0);
  vec2 m1 = max(0.6 - vec2(dot(x3,x3), dot(x4,x4)            ), 0.0);
  m0 = m0 * m0;
  m1 = m1 * m1;
  return 49.0 * ( dot(m0*m0, vec3( dot( p0, x0 ), dot( p1, x1 ), dot( p2, x2 )))
               + dot(m1*m1, vec2( dot( p3, x3 ), dot( p4, x4 ) ) ) ) ;
  }

void main() {

  vec2 p = (gl_FragCoord.xy * 2.0 - resolution) / min(resolution.x, resolution.y);
  vec3 color = vec3(1.0);

  float r_x_noise = snoise(vec4( 0.0, p.x, p.y, time)) * exp(-3.0 * fract(time * 0.5));
  float g_x_noise = snoise(vec4(10.0, p.x, p.y, time)) * exp(-3.0 * fract(time * 0.5));
  float b_x_noise = snoise(vec4(20.0, p.x, p.y, time)) * exp(-3.0 * fract(time * 0.5));

  float r_y_noise = snoise(vec4(30.0, p.x * 10.0, p.y * 10.0, time)) * exp(-3.0 * fract(time * 0.5));
  float g_y_noise = snoise(vec4(40.0, p.x * 10.0, p.y * 10.0, time)) * exp(-3.0 * fract(time * 0.5));
  float b_y_noise = snoise(vec4(50.0, p.x * 10.0, p.y * 10.0, time)) * exp(-3.0 * fract(time * 0.5));

  float drift = 200;
  float r = texture(tex, vec2(gl_FragCoord.x + r_x_noise * drift, resolution.y - gl_FragCoord.y + r_y_noise * drift)).r;
  float g = texture(tex, vec2(gl_FragCoord.x + g_x_noise * drift, resolution.y - gl_FragCoord.y + g_y_noise * drift)).g;
  float b = texture(tex, vec2(gl_FragCoord.x + b_x_noise * drift, resolution.y - gl_FragCoord.y + b_y_noise * drift)).b;
  outputColor = vec4(color - vec3(r, g, b), 1.0);
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex;

out vec4 outputColor;

// Description : Array and textureless GLSL 2D/3D/4D simplex

// noise functions.

// Author : Ian McEwan, Ashima Arts.

// Maintainer : stegu

// Lastmod : 20110822 (ijm)

// Distributed under the MIT License. See LICENSE file.

// https://github.com/ashima/webgl-noise

// https://github.com/stegu/webgl-noise

vec4 mod289(vec4 x) {

return x - floor(x * (1.0 / 289.0)) * 289.0; }

float mod289(float x) {

return x - floor(x * (1.0 / 289.0)) * 289.0; }

vec4 permute(vec4 x) {

return mod289(((x*34.0)+1.0)*x);

}

float permute(float x) {

return mod289(((x*34.0)+1.0)*x);

}

vec4 taylorInvSqrt(vec4 r)

{

return 1.79284291400159 - 0.85373472095314 * r;

}

float taylorInvSqrt(float r)

{

return 1.79284291400159 - 0.85373472095314 * r;

}

vec4 grad4(float j, vec4 ip)

{

const vec4 ones = vec4(1.0, 1.0, 1.0, -1.0);

vec4 p,s;

p.xyz = floor( fract (vec3(j) * ip.xyz) * 7.0) * ip.z - 1.0;

p.w = 1.5 - dot(abs(p.xyz), ones.xyz);

s = vec4(lessThan(p, vec4(0.0)));

p.xyz = p.xyz + (s.xyz*2.0 - 1.0) * s.www;

return p;

}

// (sqrt(5) - 1)/4 = F4, used once below

#define F4 0.309016994374947451

float snoise(vec4 v)

{

const vec4 C = vec4( 0.138196601125011, // (5 - sqrt(5))/20 G4

0.276393202250021, // 2 * G4

0.414589803375032, // 3 * G4

-0.447213595499958); // -1 + 4 * G4

// First corner

vec4 i = floor(v + dot(v, vec4(F4)) );

vec4 x0 = v - i + dot(i, C.xxxx);

// Other corners

// Rank sorting originally contributed by Bill Licea-Kane, AMD (formerly ATI)

vec4 i0;

vec3 isX = step( x0.yzw, x0.xxx );

vec3 isYZ = step( x0.zww, x0.yyz );

// i0.x = dot( isX, vec3( 1.0 ) );

i0.x = isX.x + isX.y + isX.z;

i0.yzw = 1.0 - isX;

// i0.y += dot( isYZ.xy, vec2( 1.0 ) );

i0.y += isYZ.x + isYZ.y;

i0.zw += 1.0 - isYZ.xy;

i0.z += isYZ.z;

i0.w += 1.0 - isYZ.z;

// i0 now contains the unique values 0,1,2,3 in each channel

vec4 i3 = clamp( i0, 0.0, 1.0 );

vec4 i2 = clamp( i0-1.0, 0.0, 1.0 );

vec4 i1 = clamp( i0-2.0, 0.0, 1.0 );

// x0 = x0 - 0.0 + 0.0 * C.xxxx

// x1 = x0 - i1 + 1.0 * C.xxxx

// x2 = x0 - i2 + 2.0 * C.xxxx

// x3 = x0 - i3 + 3.0 * C.xxxx

// x4 = x0 - 1.0 + 4.0 * C.xxxx

vec4 x1 = x0 - i1 + C.xxxx;

vec4 x2 = x0 - i2 + C.yyyy;

vec4 x3 = x0 - i3 + C.zzzz;

vec4 x4 = x0 + C.wwww;

// Permutations

i = mod289(i);

float j0 = permute( permute( permute( permute(i.w) + i.z) + i.y) + i.x);

vec4 j1 = permute( permute( permute( permute (

i.w + vec4(i1.w, i2.w, i3.w, 1.0 ))

+ i.z + vec4(i1.z, i2.z, i3.z, 1.0 ))

+ i.y + vec4(i1.y, i2.y, i3.y, 1.0 ))

+ i.x + vec4(i1.x, i2.x, i3.x, 1.0 ));

// Gradients: 7x7x6 points over a cube, mapped onto a 4-cross polytope

// 7*7*6 = 294, which is close to the ring size 17*17 = 289.

vec4 ip = vec4(1.0/294.0, 1.0/49.0, 1.0/7.0, 0.0) ;

vec4 p0 = grad4(j0, ip);

vec4 p1 = grad4(j1.x, ip);

vec4 p2 = grad4(j1.y, ip);

vec4 p3 = grad4(j1.z, ip);

vec4 p4 = grad4(j1.w, ip);

// Normalise gradients

vec4 norm = taylorInvSqrt(vec4(dot(p0,p0), dot(p1,p1), dot(p2, p2), dot(p3,p3)));

p0 *= norm.x;

p1 *= norm.y;

p2 *= norm.z;

p3 *= norm.w;

p4 *= taylorInvSqrt(dot(p4,p4));

// Mix contributions from the five corners

vec3 m0 = max(0.6 - vec3(dot(x0,x0), dot(x1,x1), dot(x2,x2)), 0.0);

vec2 m1 = max(0.6 - vec2(dot(x3,x3), dot(x4,x4) ), 0.0);

m0 = m0 * m0;

m1 = m1 * m1;

return 49.0 * ( dot(m0*m0, vec3( dot( p0, x0 ), dot( p1, x1 ), dot( p2, x2 )))

+ dot(m1*m1, vec2( dot( p3, x3 ), dot( p4, x4 ) ) ) ) ;

}

void main() {

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

vec3 color = vec3(1.0);

float r_x_noise = snoise(vec4( 0.0, p.x, p.y, time)) * exp(-3.0 * fract(time * 0.5));

float g_x_noise = snoise(vec4(10.0, p.x, p.y, time)) * exp(-3.0 * fract(time * 0.5));

float b_x_noise = snoise(vec4(20.0, p.x, p.y, time)) * exp(-3.0 * fract(time * 0.5));

float r_y_noise = snoise(vec4(30.0, p.x * 10.0, p.y * 10.0, time)) * exp(-3.0 * fract(time * 0.5));

float g_y_noise = snoise(vec4(40.0, p.x * 10.0, p.y * 10.0, time)) * exp(-3.0 * fract(time * 0.5));

float b_y_noise = snoise(vec4(50.0, p.x * 10.0, p.y * 10.0, time)) * exp(-3.0 * fract(time * 0.5));

float drift = 200;

float r = texture(tex, vec2(gl_FragCoord.x + r_x_noise * drift, resolution.y - gl_FragCoord.y + r_y_noise * drift)).r;

float g = texture(tex, vec2(gl_FragCoord.x + g_x_noise * drift, resolution.y - gl_FragCoord.y + g_y_noise * drift)).g;

float b = texture(tex, vec2(gl_FragCoord.x + b_x_noise * drift, resolution.y - gl_FragCoord.y + b_y_noise * drift)).b;

outputColor = vec4(color - vec3(r, g, b), 1.0);

}

[ Link ]
https://github.com/junkiyoshi/Insta20180914

2018年9月6日2018年9月6日

Split Font. openFrameworks

[ Video ]

[ About ]
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

2025年11月
月	火	水	木	金	土	日
					1	2
3	4	5	6	7	8	9
10	11	12	13	14	15	16
17	18	19	20	21	22	23
24	25	26	27	28	29	30