GLSL – ページ 15 – プログラミング de 落描き

2018年9月21日2018年9月20日

Line connection the point on circle. openframeworks

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円周上の点を結ぶ線たち

Line connection the point on circle.

[ 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) {};

	int number_of_targets;

	vector<glm::vec2> targets1;
	vector<glm::vec2> targets2;
	vector<glm::vec3> colors;

	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) {};

int number_of_targets;

vector<glm::vec2> targets1;

vector<glm::vec2> targets2;

vector<glm::vec3> colors;

ofShader shader;

};

#include "ofApp.h"

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

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

	this->number_of_targets = 80;
	for (int i = 0; i < this->number_of_targets; i++) {

		this->targets1.push_back(glm::vec2(ofRandom(ofGetWidth()), ofRandom(ofGetHeight())));
		this->targets2.push_back(glm::vec2(ofRandom(ofGetWidth()), ofRandom(ofGetHeight())));

		glm::vec3  color = glm::vec3(1.0, 1.0, 1.0);
		int color_type = i % 6;
		switch (color_type) {
		case 0:
			color = glm::vec4(1.0, 0.0, 0.0, 0.0);
			break;
		case 1:
			color = glm::vec4(0.0, 1.0, 0.0, 0.0);
			break;
		case 2:
			color = glm::vec4(0.0, 0.0, 1.0, 0.0);
			break;
		case 3:
			color = glm::vec4(1.0, 1.0, 0.0, 0.0);
			break;
		case 4:
			color = glm::vec4(0.0, 1.0, 1.0, 0.0);
			break;
		case 5:
			color = glm::vec4(1.0, 0.0, 1.0, 0.0);
			break;
		}
		this->colors.push_back(color);
	}

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

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

	ofSeedRandom(39);

	float radius = 300;
	for (int i = 0; i < this->number_of_targets; i++) {

		int deg1 = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.001), 0, 1, -360, 360);
		this->targets1[i] = glm::vec2(radius * cos(deg1 * DEG_TO_RAD) + ofGetWidth() * 0.5 , radius * sin(deg1 * DEG_TO_RAD) + ofGetHeight() * 0.5);

		int deg2 = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.001), 0, 1, -360, 360);
		this->targets2[i] = glm::vec2(radius * cos(deg2 * DEG_TO_RAD) + ofGetWidth() * 0.5, radius * sin(deg2 * DEG_TO_RAD) + ofGetHeight() * 0.5);
	}
}

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

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniform2fv("targets1", &this->targets1[0].x, this->number_of_targets);
	this->shader.setUniform2fv("targets2", &this->targets2[0].x, this->number_of_targets);
	this->shader.setUniform3fv("colors", &this->colors[0].x, this->number_of_targets);

	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->number_of_targets = 80;

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

this->targets1.push_back(glm::vec2(ofRandom(ofGetWidth()), ofRandom(ofGetHeight())));

this->targets2.push_back(glm::vec2(ofRandom(ofGetWidth()), ofRandom(ofGetHeight())));

glm::vec3 color = glm::vec3(1.0, 1.0, 1.0);

int color_type = i % 6;

switch (color_type) {

case 0:

color = glm::vec4(1.0, 0.0, 0.0, 0.0);

break;

case 1:

color = glm::vec4(0.0, 1.0, 0.0, 0.0);

break;

case 2:

color = glm::vec4(0.0, 0.0, 1.0, 0.0);

break;

case 3:

color = glm::vec4(1.0, 1.0, 0.0, 0.0);

break;

case 4:

color = glm::vec4(0.0, 1.0, 1.0, 0.0);

break;

case 5:

color = glm::vec4(1.0, 0.0, 1.0, 0.0);

break;

}

this->colors.push_back(color);

}

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

}

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

void ofApp::update() {

ofSeedRandom(39);

float radius = 300;

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

int deg1 = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.001), 0, 1, -360, 360);

this->targets1[i] = glm::vec2(radius * cos(deg1 * DEG_TO_RAD) + ofGetWidth() * 0.5 , radius * sin(deg1 * DEG_TO_RAD) + ofGetHeight() * 0.5);

int deg2 = ofMap(ofNoise(ofRandom(100), ofGetFrameNum() * 0.001), 0, 1, -360, 360);

this->targets2[i] = glm::vec2(radius * cos(deg2 * DEG_TO_RAD) + ofGetWidth() * 0.5, radius * sin(deg2 * DEG_TO_RAD) + ofGetHeight() * 0.5);

}

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

void ofApp::draw() {

this->shader.begin();

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

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

this->shader.setUniform2fv("targets1", &this->targets1[0].x, this->number_of_targets);

this->shader.setUniform2fv("targets2", &this->targets2[0].x, this->number_of_targets);

this->shader.setUniform3fv("colors", &this->colors[0].x, this->number_of_targets);

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

const int number_of_targets = 80;

uniform float time;
uniform vec2 resolution;
uniform vec2 targets1[number_of_targets];
uniform vec2 targets2[number_of_targets];
uniform vec3 colors[number_of_targets];

out vec4 outputColor;

/// Reference
/// https://trap.jp/post/142/
float crs(vec2 v1, vec2 v2) {
    return v1.x*v2.y - v1.y*v2.x;
}

// 2点v1, v2を端点に持つ線分との距離を返す
float line(vec2 p, vec2 v1, vec2 v2) {
    p  -= v1;
    vec2 v = v2-v1;
    float t = dot(p, normalize(v));
    if (t<0.0) {
        return length(p);
    } else if (t>length(v)) {
        return length(p-v);
    } else {
        return abs(crs(p, normalize(v)));
    }
}

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 t1 = vec2(targets1[i].x, -targets1[i].y) / min(resolution.x, resolution.y) * 2.0;
    vec2 t2 = vec2(targets2[i].x, -targets2[i].y) / min(resolution.x, resolution.y) * 2.0;
    t1.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);
    t2.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

    float v = 0.01 / line(p, t1, t2);
    float r = v * colors[i].x;
    float g = v * colors[i].y;
    float b = v * colors[i].z;
    vec3 c = vec3(smoothstep(0.01, 1.0, r), smoothstep(0.01, 1.0, g), smoothstep(0.01, 1.0, b));
    color += c;
  }

  outputColor = vec4(color, 1.0);
}

#version 150

const int number_of_targets = 80;

uniform float time;

uniform vec2 resolution;

uniform vec2 targets1[number_of_targets];

uniform vec2 targets2[number_of_targets];

uniform vec3 colors[number_of_targets];

out vec4 outputColor;

/// Reference

/// https://trap.jp/post/142/

float crs(vec2 v1, vec2 v2) {

return v1.x*v2.y - v1.y*v2.x;

}

// 2点v1, v2を端点に持つ線分との距離を返す

float line(vec2 p, vec2 v1, vec2 v2) {

p -= v1;

vec2 v = v2-v1;

float t = dot(p, normalize(v));

if (t<0.0) {

return length(p);

} else if (t>length(v)) {

return length(p-v);

} else {

return abs(crs(p, normalize(v)));

}

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 t1 = vec2(targets1[i].x, -targets1[i].y) / min(resolution.x, resolution.y) * 2.0;

vec2 t2 = vec2(targets2[i].x, -targets2[i].y) / min(resolution.x, resolution.y) * 2.0;

t1.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

t2.xy += vec2(-resolution.x, resolution.y) / min(resolution.x, resolution.y);

float v = 0.01 / line(p, t1, t2);

float r = v * colors[i].x;

float g = v * colors[i].y;

float b = v * colors[i].z;

vec3 c = vec3(smoothstep(0.01, 1.0, r), smoothstep(0.01, 1.0, g), smoothstep(0.01, 1.0, b));

color += c;

}

outputColor = vec4(color, 1.0);

}

[ Link ]
https://github.com/junkiyoshi/Insta20180921

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2018年9月17日

Ascii man. openframeworks

[ Video ]

[ About ]
Kinectから取得した画像&深度と差し替え用の絵をシェーダに送信、ピクセル単位の深度で描写する絵を切り替え。シェーダのおかげで描写がなめらか＆高速化！

Send images and depth acquired from Kinect, replacement pictures to the shaders, switch pictures depicted in units of pixels

[ Source ]

#pragma once

#include <Windows.h>
#include <NuiApi.h>
#include <opencv2/opencv.hpp>
#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) {}

	// Kinect
	INuiSensor* sensor;
	INuiCoordinateMapper* cordinate_mapper;
	HANDLE color_event;
	HANDLE color_handle;
	HANDLE depth_event;
	HANDLE depth_handle;
	HANDLE events[2];
	int width, height;

	// OpenCV
	cv::Mat frame;
	cv::Mat depth;

	// openFrameworks
	ofImage frame_img;
	ofImage depth_img;
	ofFbo fbo;
	ofShader shader;
	ofTrueTypeFont font;
};

#pragma once

#include <Windows.h>

#include <NuiApi.h>

#include <opencv2/opencv.hpp>

#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) {}

// Kinect

INuiSensor* sensor;

INuiCoordinateMapper* cordinate_mapper;

HANDLE color_event;

HANDLE color_handle;

HANDLE depth_event;

HANDLE depth_handle;

HANDLE events[2];

int width, height;

// OpenCV

cv::Mat frame;

cv::Mat depth;

// openFrameworks

ofImage frame_img;

ofImage depth_img;

ofFbo fbo;

ofShader shader;

ofTrueTypeFont font;

};

#include "ofApp.h"

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

	ofSetFrameRate(30);
	ofSetWindowTitle("InstaKinect");

	// Create Instance
	this->sensor = nullptr;
	HRESULT result = S_OK;
	result = NuiCreateSensorByIndex(0, &sensor);
	if (FAILED(result)) {
		cout << "Error : Create Sensor" << endl;
		return;
	}

	// Initialize
	result = sensor->NuiInitialize(NUI_INITIALIZE_FLAG_USES_COLOR | NUI_INITIALIZE_FLAG_USES_DEPTH);
	if (FAILED(result)) {
		cout << "Error : Initialise COLOR" << endl;
		return;
	}

	// Color
	this->color_event = INVALID_HANDLE_VALUE;
	this->color_handle = INVALID_HANDLE_VALUE;
	color_event = CreateEventW(nullptr, true, false, nullptr);
	result = sensor->NuiImageStreamOpen(NUI_IMAGE_TYPE_COLOR, NUI_IMAGE_RESOLUTION_640x480, 0, 2, color_event, &color_handle);
	if (FAILED(result)) {
		cout << "Error : Color Stream Open" << endl;
		return;
	}

	// Depth
	this->depth_event = INVALID_HANDLE_VALUE;
	this->depth_handle = INVALID_HANDLE_VALUE;
	depth_event = CreateEventW(nullptr, true, false, nullptr);
	result = sensor->NuiImageStreamOpen(NUI_IMAGE_TYPE_DEPTH, NUI_IMAGE_RESOLUTION_640x480, 0, 2, depth_event, &depth_handle);
	if (FAILED(result)) {
		cout << "Error : Depth Stream Open" << endl;
		return;
	}

	// Size
	unsigned long refWidth = 0;
	unsigned long refHeight = 0;
	NuiImageResolutionToSize(NUI_IMAGE_RESOLUTION_640x480, refWidth, refHeight);
	this->width = static_cast<int>(refWidth);
	this->height = static_cast<int>(refHeight);

	// Mapp
	this->cordinate_mapper = nullptr;
	result = sensor->NuiGetCoordinateMapper(&this->cordinate_mapper);
	if (FAILED(result)) {
		cout << "Error : Cordinate Mapper " << endl;
		return;
	}

	// OpenCV
	this->frame_img.allocate(this->width, this->height, OF_IMAGE_COLOR);
	this->frame = cv::Mat(this->frame_img.getHeight(), this->frame_img.getWidth(), CV_MAKETYPE(CV_8UC3, this->frame_img.getPixels().getNumChannels()), this->frame_img.getPixels().getData(), 0);
	this->depth_img.allocate(this->width, this->height, OF_IMAGE_COLOR);
	this->depth = cv::Mat(this->depth_img.getHeight(), this->depth_img.getWidth(), CV_MAKETYPE(CV_8UC3, this->depth_img.getPixels().getNumChannels()), this->depth_img.getPixels().getData(), 0);

	this->events[0] = this->color_event;
	this->events[1] = this->depth_event;

	// FBO & Shader
	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	this->shader.load("", "shader/shader.frag");

	this->font.loadFont("fonts/Kazesawa-Bold.ttf", 7);
}

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

	HRESULT result = S_OK;

	// Color Table
	cv::Vec3b color[7];
	color[0] = cv::Vec3b(0, 0, 0);
	color[1] = cv::Vec3b(255, 0, 0);
	color[2] = cv::Vec3b(0, 255, 0);
	color[3] = cv::Vec3b(0, 0, 255);
	color[4] = cv::Vec3b(255, 255, 0);
	color[5] = cv::Vec3b(255, 0, 255);
	color[6] = cv::Vec3b(0, 255, 255);

	std::vector<NUI_COLOR_IMAGE_POINT> color_point(width * height);

	// Wait frame update.
	ResetEvent(this->color_event);
	ResetEvent(this->depth_event);
	WaitForMultipleObjects(ARRAYSIZE(this->events), this->events, true, INFINITE);

	// Get frame from color camera.
	NUI_IMAGE_FRAME colorImageFrame = { 0 };
	result = sensor->NuiImageStreamGetNextFrame(this->color_handle, 0, &colorImageFrame);
	if (FAILED(result)) {
		std::cerr << "Error : NuiImageStreamGetNextFrame( COLOR )" << std::endl;
		return;
	}

	// Get image data.
	INuiFrameTexture* pColorFrameTexture = colorImageFrame.pFrameTexture;
	NUI_LOCKED_RECT colorLockedRect;
	pColorFrameTexture->LockRect(0, &colorLockedRect, nullptr, 0);

	//// Get frame from depth camera.
	NUI_IMAGE_FRAME depthImageFrame = { 0 };
	result = this->sensor->NuiImageStreamGetNextFrame(this->depth_handle, 0, &depthImageFrame);
	if (FAILED(result)) {
		std::cerr << "Error : NuiImageStreamGetNextFrame( DEPTH )" << std::endl;
		return;
	}

	// Get depth data.
	BOOL nearMode = false;
	INuiFrameTexture* pDepthFrameTexture = nullptr;
	this->sensor->NuiImageFrameGetDepthImagePixelFrameTexture(this->depth_handle, &depthImageFrame, &nearMode, &pDepthFrameTexture);
	NUI_LOCKED_RECT depthLockedRect;
	pDepthFrameTexture->LockRect(0, &depthLockedRect, nullptr, 0);

	// OpenCV(image)
	cv::Mat src = cv::Mat(this->height, this->width, CV_8UC4, reinterpret_cast<unsigned char*>(colorLockedRect.pBits));
	cv::cvtColor(src, this->frame, CV_BGRA2RGB);

	// OpenCV(depth)
	cv::Mat bufferMat = cv::Mat::zeros(height, width, CV_8UC3);
	NUI_DEPTH_IMAGE_PIXEL* depth_pixel = reinterpret_cast<NUI_DEPTH_IMAGE_PIXEL*>(depthLockedRect.pBits);
	this->cordinate_mapper->MapDepthFrameToColorFrame(NUI_IMAGE_RESOLUTION_640x480, width * height, depth_pixel, NUI_IMAGE_TYPE_COLOR, NUI_IMAGE_RESOLUTION_640x480, width * height, &color_point[0]);
	for (int y = 0; y < height; y++) {
		for (int x = 0; x < width; x++) {
			unsigned int index = y * width + x;
			bufferMat.at<cv::Vec3b>(color_point[index].y, color_point[index].x)[0] = depth_pixel[index].depth / 255;
			bufferMat.at<cv::Vec3b>(color_point[index].y, color_point[index].x)[1] = depth_pixel[index].depth - (int)(depth_pixel[index].depth / 255) * 255;
		}
	}
	bufferMat.copyTo(this->depth);
	
	// Release
	pColorFrameTexture->UnlockRect(0);
	pDepthFrameTexture->UnlockRect(0);
	this->sensor->NuiImageStreamReleaseFrame(this->color_handle, &colorImageFrame);
	this->sensor->NuiImageStreamReleaseFrame(this->depth_handle, &depthImageFrame);

	// ofImage Update
	this->frame_img.update();
	this->depth_img.update();

	// Make FBO
	ofSeedRandom(39);
	string moji = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	this->fbo.begin();
	ofClear(0);

	ofBackground(0);

	for (int x = 0; x < ofGetWidth(); x += 10) {

		for (int y = 0; y < ofGetHeight(); y += 10) {

			ofSetColor(ofColor(0, 255 * ofNoise(x, y * 0.025 - ofGetFrameNum() * 0.05), 0));
			this->font.drawString(moji.substr((int)ofRandom(26), 1), x, y);
		}
	}

	this->fbo.end();

}

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

	ofSetColor(255);

	this->shader.begin();
	this->shader.setUniform1f("time", ofGetElapsedTimef());
	this->shader.setUniform2f("resolution", ofGetWidth(), ofGetHeight());
	this->shader.setUniformTexture("tex1", this->frame_img, 1);
	this->shader.setUniformTexture("tex2", this->fbo.getTexture(), 2);
	this->shader.setUniformTexture("depth", this->depth_img, 3);

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

	this->shader.end();
}

//========================================================================
int main() {
	ofSetupOpenGL(640, 480, OF_WINDOW);
	ofRunApp(new ofApp());
}

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#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(30);

ofSetWindowTitle("InstaKinect");

// Create Instance

this->sensor = nullptr;

HRESULT result = S_OK;

result = NuiCreateSensorByIndex(0, &sensor);

if (FAILED(result)) {

cout << "Error : Create Sensor" << endl;

return;

}

// Initialize

result = sensor->NuiInitialize(NUI_INITIALIZE_FLAG_USES_COLOR | NUI_INITIALIZE_FLAG_USES_DEPTH);

if (FAILED(result)) {

cout << "Error : Initialise COLOR" << endl;

return;

}

// Color

this->color_event = INVALID_HANDLE_VALUE;

this->color_handle = INVALID_HANDLE_VALUE;

color_event = CreateEventW(nullptr, true, false, nullptr);

result = sensor->NuiImageStreamOpen(NUI_IMAGE_TYPE_COLOR, NUI_IMAGE_RESOLUTION_640x480, 0, 2, color_event, &color_handle);

if (FAILED(result)) {

cout << "Error : Color Stream Open" << endl;

return;

}

// Depth

this->depth_event = INVALID_HANDLE_VALUE;

this->depth_handle = INVALID_HANDLE_VALUE;

depth_event = CreateEventW(nullptr, true, false, nullptr);

result = sensor->NuiImageStreamOpen(NUI_IMAGE_TYPE_DEPTH, NUI_IMAGE_RESOLUTION_640x480, 0, 2, depth_event, &depth_handle);

if (FAILED(result)) {

cout << "Error : Depth Stream Open" << endl;

return;

}

// Size

unsigned long refWidth = 0;

unsigned long refHeight = 0;

NuiImageResolutionToSize(NUI_IMAGE_RESOLUTION_640x480, refWidth, refHeight);

this->width = static_cast<int>(refWidth);

this->height = static_cast<int>(refHeight);

// Mapp

this->cordinate_mapper = nullptr;

result = sensor->NuiGetCoordinateMapper(&this->cordinate_mapper);

if (FAILED(result)) {

cout << "Error : Cordinate Mapper " << endl;

return;

}

// OpenCV

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

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

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

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

this->events[0] = this->color_event;

this->events[1] = this->depth_event;

// FBO & Shader

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

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

this->font.loadFont("fonts/Kazesawa-Bold.ttf", 7);

}

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

void ofApp::update() {

HRESULT result = S_OK;

// Color Table

cv::Vec3b color[7];

color[0] = cv::Vec3b(0, 0, 0);

color[1] = cv::Vec3b(255, 0, 0);

color[2] = cv::Vec3b(0, 255, 0);

color[3] = cv::Vec3b(0, 0, 255);

color[4] = cv::Vec3b(255, 255, 0);

color[5] = cv::Vec3b(255, 0, 255);

color[6] = cv::Vec3b(0, 255, 255);

std::vector<NUI_COLOR_IMAGE_POINT> color_point(width * height);

// Wait frame update.

ResetEvent(this->color_event);

ResetEvent(this->depth_event);

WaitForMultipleObjects(ARRAYSIZE(this->events), this->events, true, INFINITE);

// Get frame from color camera.

NUI_IMAGE_FRAME colorImageFrame = { 0 };

result = sensor->NuiImageStreamGetNextFrame(this->color_handle, 0, &colorImageFrame);

if (FAILED(result)) {

std::cerr << "Error : NuiImageStreamGetNextFrame( COLOR )" << std::endl;

return;

}

// Get image data.

INuiFrameTexture* pColorFrameTexture = colorImageFrame.pFrameTexture;

NUI_LOCKED_RECT colorLockedRect;

pColorFrameTexture->LockRect(0, &colorLockedRect, nullptr, 0);

//// Get frame from depth camera.

NUI_IMAGE_FRAME depthImageFrame = { 0 };

result = this->sensor->NuiImageStreamGetNextFrame(this->depth_handle, 0, &depthImageFrame);

if (FAILED(result)) {

std::cerr << "Error : NuiImageStreamGetNextFrame( DEPTH )" << std::endl;

return;

}

// Get depth data.

BOOL nearMode = false;

INuiFrameTexture* pDepthFrameTexture = nullptr;

this->sensor->NuiImageFrameGetDepthImagePixelFrameTexture(this->depth_handle, &depthImageFrame, &nearMode, &pDepthFrameTexture);

NUI_LOCKED_RECT depthLockedRect;

pDepthFrameTexture->LockRect(0, &depthLockedRect, nullptr, 0);

// OpenCV(image)

cv::Mat src = cv::Mat(this->height, this->width, CV_8UC4, reinterpret_cast<unsigned char*>(colorLockedRect.pBits));

cv::cvtColor(src, this->frame, CV_BGRA2RGB);

// OpenCV(depth)

cv::Mat bufferMat = cv::Mat::zeros(height, width, CV_8UC3);

NUI_DEPTH_IMAGE_PIXEL* depth_pixel = reinterpret_cast<NUI_DEPTH_IMAGE_PIXEL*>(depthLockedRect.pBits);

this->cordinate_mapper->MapDepthFrameToColorFrame(NUI_IMAGE_RESOLUTION_640x480, width * height, depth_pixel, NUI_IMAGE_TYPE_COLOR, NUI_IMAGE_RESOLUTION_640x480, width * height, &color_point[0]);

for (int y = 0; y < height; y++) {

for (int x = 0; x < width; x++) {

unsigned int index = y * width + x;

bufferMat.at<cv::Vec3b>(color_point[index].y, color_point[index].x)[0] = depth_pixel[index].depth / 255;

bufferMat.at<cv::Vec3b>(color_point[index].y, color_point[index].x)[1] = depth_pixel[index].depth - (int)(depth_pixel[index].depth / 255) * 255;

}

bufferMat.copyTo(this->depth);

// Release

pColorFrameTexture->UnlockRect(0);

pDepthFrameTexture->UnlockRect(0);

this->sensor->NuiImageStreamReleaseFrame(this->color_handle, &colorImageFrame);

this->sensor->NuiImageStreamReleaseFrame(this->depth_handle, &depthImageFrame);

// ofImage Update

this->frame_img.update();

this->depth_img.update();

// Make FBO

ofSeedRandom(39);

string moji = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

this->fbo.begin();

ofClear(0);

ofBackground(0);

for (int x = 0; x < ofGetWidth(); x += 10) {

for (int y = 0; y < ofGetHeight(); y += 10) {

ofSetColor(ofColor(0, 255 * ofNoise(x, y * 0.025 - ofGetFrameNum() * 0.05), 0));

this->font.drawString(moji.substr((int)ofRandom(26), 1), x, y);

}

this->fbo.end();

}

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

void ofApp::draw() {

ofSetColor(255);

this->shader.begin();

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

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

this->shader.setUniformTexture("tex1", this->frame_img, 1);

this->shader.setUniformTexture("tex2", this->fbo.getTexture(), 2);

this->shader.setUniformTexture("depth", this->depth_img, 3);

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

this->shader.end();

}

//========================================================================

int main() {

ofSetupOpenGL(640, 480, OF_WINDOW);

ofRunApp(new ofApp());

}

#version 150

uniform float time;
uniform vec2 resolution;
uniform sampler2DRect tex1;
uniform sampler2DRect tex2;
uniform sampler2DRect depth;

out vec4 outputColor;

void main() {

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

  vec4 t1 = texture(tex1, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));
  vec4 t2 = texture(tex2, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

  float r = texture(depth, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y)).r;
  float g = texture(depth, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y)).g;
  float d = r * 255.0 + g;
  d /= 65,536;

  vec4 color = d < 0.1 ? t2 : t1;
  gl_FragColor = color;
}

#version 150

uniform float time;

uniform vec2 resolution;

uniform sampler2DRect tex1;

uniform sampler2DRect tex2;

uniform sampler2DRect depth;

out vec4 outputColor;

void main() {

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

vec4 t1 = texture(tex1, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

vec4 t2 = texture(tex2, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y));

float r = texture(depth, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y)).r;

float g = texture(depth, vec2(gl_FragCoord.x, resolution.y - gl_FragCoord.y)).g;

float d = r * 255.0 + g;

d /= 65,536;

vec4 color = d < 0.1 ? t2 : t1;

gl_FragColor = color;

}

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2018年9月16日2018年9月16日

Wobbling line. openFrameworks

[ Video ]

[ About ]
ぐにゃぐにゃライン

Wobbling line.

[ 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;
	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;

ofShader shader;

};

#include "ofApp.h"

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

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

	ofSetLineWidth(3.0);

	this->fbo.allocate(ofGetWidth(), ofGetHeight());
	this->shader.load("shader/shader.vert", "shader/shader.frag");
}
//--------------------------------------------------------------
void ofApp::update() {
	
	ofSeedRandom(39);

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

	int deg_len = 130;
	for (int i = 0; i < 10; i++) {

		int radius = 30 * (i + 1);
		int circle_deg = ofGetFrameNum() + deg_len + i * 30;
		float x = radius * cos(circle_deg * DEG_TO_RAD);
		float y = radius * sin(circle_deg * DEG_TO_RAD);
		ofFill();
		ofDrawCircle(x, y, 10);

		ofPoint prev = ofPoint();
		for (int deg = ofGetFrameNum() + i * 30; deg < circle_deg; deg++) {

			x = radius * cos(deg * DEG_TO_RAD);
			y = radius * sin(deg * DEG_TO_RAD);

			if (prev != ofPoint()) { ofDrawLine(ofPoint(x, y), prev); }
			prev = ofPoint(x, y);
		}
	}
	
	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(720, 720);
	ofCreateWindow(settings);
	ofRunApp(new ofApp());
}

#include "ofApp.h"

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

void ofApp::setup() {

ofSetFrameRate(60);

ofSetWindowTitle("openframeworks");

ofSetLineWidth(3.0);

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

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

}

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

void ofApp::update() {

ofSeedRandom(39);

this->fbo.begin();

ofClear(0);

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

int deg_len = 130;

for (int i = 0; i < 10; i++) {

int radius = 30 * (i + 1);

int circle_deg = ofGetFrameNum() + deg_len + i * 30;

float x = radius * cos(circle_deg * DEG_TO_RAD);

float y = radius * sin(circle_deg * DEG_TO_RAD);

ofFill();

ofDrawCircle(x, y, 10);

ofPoint prev = ofPoint();

for (int deg = ofGetFrameNum() + i * 30; deg < circle_deg; deg++) {

x = radius * cos(deg * DEG_TO_RAD);

y = radius * sin(deg * DEG_TO_RAD);

if (prev != ofPoint()) { ofDrawLine(ofPoint(x, y), prev); }

prev = ofPoint(x, y);

}

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(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;

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(0.85);

  float r_x_noise = snoise(vec4( 0.0, p.x * 5.0, p.y * 5.0, time));
  float g_x_noise = snoise(vec4(10.0, p.x * 5.0, p.y * 5.0, time));
  float b_x_noise = snoise(vec4(20.0, p.x * 5.0, p.y * 5.0, time));

  float r_y_noise = snoise(vec4(30.0, p.x * 5.0, p.y * 5.0, time));
  float g_y_noise = snoise(vec4(40.0, p.x * 5.0, p.y * 5.0, time));
  float b_y_noise = snoise(vec4(50.0, p.x * 5.0, p.y * 5.0, time));

  float drift = 15;
  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);
}

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#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(0.85);

float r_x_noise = snoise(vec4( 0.0, p.x * 5.0, p.y * 5.0, time));

float g_x_noise = snoise(vec4(10.0, p.x * 5.0, p.y * 5.0, time));

float b_x_noise = snoise(vec4(20.0, p.x * 5.0, p.y * 5.0, time));

float r_y_noise = snoise(vec4(30.0, p.x * 5.0, p.y * 5.0, time));

float g_y_noise = snoise(vec4(40.0, p.x * 5.0, p.y * 5.0, time));

float b_y_noise = snoise(vec4(50.0, p.x * 5.0, p.y * 5.0, time));

float drift = 15;

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/Insta20180916

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