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2d-rotative-shapes-dance.html
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2d-rotative-shapes-dance.html
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<!DOCTYPE html>
<html>
<head>
<link rel="shortcut icon" type="image/x-icon" href="https://github.com/raw/rubenandrebarreiro/rubenandrebarreiro.github.io/master/assets/images/javascript-logo-1.png"/>
<style>
body {
color: #000;
font-family:Tahoma;
font-size:13px;
font-weight: bold;
background-color: #000000;
background-image: url("imgs/JPGs/background.jpg");
}
#container {
position: absolute;
border-radius: 5px;
}
#workDescription {
background:#eeeeee;
position: absolute;
left: 8px; top: 578px;
padding:0;
margin:0;
overflow:hidden;
width: 1200px;
border-radius: 5px;
text-align: center;
}
#authorsInfo {
background:#eeeeee;
position: absolute;
left: 8px; top: 840px;
padding:0;
margin:0;
overflow:hidden;
width: 1200px;
border-radius: 5px;
text-align: center;
}
#instructions {
background:#eeeeee;
position: absolute;
left: 1220px; top: 24px;
padding:0;
margin:0;
overflow:hidden;
width: 640px;
border-radius: 5px;
text-align: center;
}
#settings {
background:#eeeeee;
position: absolute;
left: 1220px; top: 190px;
padding:0;
margin:0;
overflow:hidden;
width: 640px;
border-radius: 5px;
text-align: center;
}
a {
color: #35b0ab;
}
.color {
display: inline-block;
zoom:1; *display: inline;
width: 200px;
height: 40px;
border: 1px solid rgba(0, 0, 0, 0.5);
-webkit-box-shadow: 1px 1px 2px 0px rgba(0, 0, 0, 0.3);
-moz-box-shadow: 1px 1px 2px 0px rgba(0, 0, 0, 0.3);
box-shadow: 1px 1px 2px 0px rgba(0, 0, 0, 0.3);
background-color: rgba(0, 0, 0, 1.0);
}
</style>
<script id="vertex-shader" type="x-shader/x-vertex">
precision mediump float;
attribute vec2 vPosition;
attribute vec4 vColor;
attribute vec3 vSizeFigureSpeed;
attribute vec2 vBlurDirection;
varying vec4 fColor;
varying vec3 fSizeFigureSpeed;
varying vec2 fBlurDirection;
uniform float time;
void main() {
gl_Position = vec4(vPosition, 0.0, 1.0); // The last argument must be 1.0, because it's the normalization coordinate
gl_PointSize = vSizeFigureSpeed[0];
fColor = vColor;
fSizeFigureSpeed = vSizeFigureSpeed;
fBlurDirection = vBlurDirection;
}
</script>
<script id="fragment-shader" type="x-shader/x-fragment">
precision mediump float;
varying vec4 fColor;
varying vec3 fSizeFigureSpeed;
varying vec2 fBlurDirection;
uniform float time;
float getDist1D(float a, float b) {
float dist = (a - b);
return dist > 0.0 ? dist : dist * -1.0;
}
vec2 getPos(vec2 p) {
return vec2(2.0, -2.0) * p - vec2(1.0, -1.0);
}
// FIGURE 1 - SQUARE
vec4 square(vec2 posToDraw, vec4 color, bool blur) {
float a = sqrt(2.0)/2.0;
// Draw a Square
if(posToDraw.x > a || posToDraw.x < -a || posToDraw.y > a || posToDraw.y < -a) {
discard;
}
// Option of blur effect
if(blur) {
if(posToDraw.x < 0.0) {
posToDraw.x *= -1.0;
}
if(posToDraw.y < 0.0) {
posToDraw.y *= -1.0;
}
float maxFromCoord;
if(posToDraw.x > posToDraw.y) {
maxFromCoord = posToDraw.x;
}
else {
maxFromCoord = posToDraw.y;
}
return vec4(color.xyz, 1.0 - smoothstep(0.6, a, maxFromCoord));
}
else {
return color;
}
}
// FIGURE 2 - CIRCLE
vec4 circle(vec2 posToDraw, vec4 color, bool blur) {
float dist = distance(vec2(0.0, 0.0), posToDraw);
float radio = 1.0;
// Draw a Circle
if(dist > radio) {
discard;
}
// Option of blur effect
if(blur) {
return vec4(color.xyz, 1.0 - smoothstep(0.8, 1.0, dist));
}
else {
return color;
}
}
// FIGURE 3 - CROSS
vec4 cross(vec2 posToDraw, vec4 color, bool blur) {
float edgeToDiscard1 = 0.75;
float edgeToDiscard2 = 0.25;
bool xyEdgesCond1 = posToDraw.x > edgeToDiscard1 || posToDraw.x < -edgeToDiscard1 ||
posToDraw.y > edgeToDiscard1 || posToDraw.y < -edgeToDiscard1;
bool xyEdgesCond2 = posToDraw.x > edgeToDiscard2 && posToDraw.y > edgeToDiscard2;
bool xyEdgesCond3 = posToDraw.x < -edgeToDiscard2 && posToDraw.y > edgeToDiscard2;
bool xyEdgesCond4 = posToDraw.x < -edgeToDiscard2 && posToDraw.y < -edgeToDiscard2;
bool xyEdgesCond5 = posToDraw.x > edgeToDiscard2 && posToDraw.y < -edgeToDiscard2;
// Draw a Cross
if(xyEdgesCond1 || xyEdgesCond2 || xyEdgesCond3 || xyEdgesCond4 || xyEdgesCond5) {
discard;
}
// Option of blur effect
if(blur) {
float dist = distance(vec2(0.0, 0.0), posToDraw);
bool softEdge1 = posToDraw.x > 0.15 && posToDraw.y > 0.15;// && posToDraw.x < 0.5 && posToDraw.y < 0.5;
bool softEdge2 = posToDraw.x < -0.15 && posToDraw.y > 0.15;// && posToDraw.x > -0.5 && posToDraw.y < 0.5;
bool softEdge3 = posToDraw.x < -0.15 && posToDraw.y < -0.15;// && posToDraw.x > -0.5 && posToDraw.y > -0.5;
bool softEdge4 = posToDraw.x > 0.15 && posToDraw.y < -0.15;// && posToDraw.x < 0.5 && posToDraw.y > -0.5;
bool softEdge5 = posToDraw.x > 0.745 || posToDraw.x < -0.745 || posToDraw.y > 0.745 || posToDraw.y < -0.745;
float absX = (posToDraw.x > 0.0) ? posToDraw.x : posToDraw.x * (-1.0);
float absY = (posToDraw.y > 0.0) ? posToDraw.y : posToDraw.y * (-1.0);
float maxFromCoord = (absX > absY) ? absX : absY;
float minFromCoord = (absX < absY) ? absX : absY;
if(softEdge1 || softEdge2 || softEdge3 || softEdge4) {
return vec4(color.xyz, 1.0 - smoothstep(0.15, edgeToDiscard2, minFromCoord));
}
else if(softEdge5) {
return vec4(color.xyz, 1.0 - smoothstep(0.745, 0.75, maxFromCoord));
}
else {
return color;
}
}
else {
return color;
}
}
// FIGURE 4 - DONUT/TORUS (NORMAL)
vec4 donut1(vec2 posToDraw, vec4 color, bool blur) {
float dist = distance(vec2(0.0, 0.0), getPos(gl_PointCoord));
// Draw a Donut/Torus (Excluding the interior radio)
if(dist > 1.0 || dist < 0.5) {
discard;
}
bool firstEdgeOfRadio = getDist1D(0.5, dist) < getDist1D(1.0, dist);
// Option of blur effect
if(blur) {
if(firstEdgeOfRadio) {
return vec4(color.xyz, 1.0 - smoothstep(0.65, 0.5, dist));
}
else {
return vec4(color.xyz, 1.0 - smoothstep(0.85, 1.0, dist));
}
}
else {
return color;
}
}
// FIGURE 5 - HEART
vec4 heart(vec2 posToDraw, vec4 color, bool blur) {
float radio = pow(posToDraw.x, 2.0) + pow((5.0 * (posToDraw.y + 0.25)/4.0 - sqrt(abs(posToDraw.x))), 2.0);
if(0.5 < radio) {
discard;
}
// Option of blur effect
if(blur) {
bool drawBlur = (0.25 < radio);
if(drawBlur) {
return vec4(color.xyz, 1.0 - smoothstep(0.25, 0.5, radio));
}
else {
return color;
}
}
else {
return color;
}
}
// FIGURE 6 - FRAME
vec4 frame(vec2 posToDraw, vec4 color, bool blur) {
float a = sqrt(2.0)/2.0;
float b = 0.5 * a;
float c = 0.75 * a;
// Draw a Square
if(posToDraw.x > a || posToDraw.x < -a || posToDraw.y > a || posToDraw.y < -a) {
discard;
}
if(posToDraw.x < b && posToDraw.x > -b && posToDraw.y < b && posToDraw.y > -b) {
discard;
}
// Option of blur effect
if(blur) {
float absX = abs(posToDraw.x);
float absY = abs(posToDraw.y);
float maxFromCoord = (absX > absY)? absX : absY;
if(maxFromCoord > c) {
return vec4(color.xyz, 1.0 - smoothstep(c, a, maxFromCoord));
}
else {
return vec4(color.xyz, 1.0 - smoothstep(c, b, maxFromCoord));
}
}
else {
return color;
}
}
// FIGURE 7 - ASTROID
vec4 astroid(vec2 posToDraw, vec4 color) {
float a = 1.0;
float astroidEq1 = (pow(posToDraw.x, (2.0/3.0))) + (pow(posToDraw.y, (2.0/3.0))) - (pow(a, (2.0/3.0)));
float astroidEq2 = (pow(-posToDraw.x, (2.0/3.0))) + (pow(posToDraw.y, (2.0/3.0))) - (pow(a, (2.0/3.0)));
float astroidEq3 = (pow(posToDraw.x, (2.0/3.0))) + (pow(-posToDraw.y, (2.0/3.0))) - (pow(a, (2.0/3.0)));
float astroidEq4 = (pow(-posToDraw.x, (2.0/3.0))) + (pow(-posToDraw.y, (2.0/3.0))) - (pow(a, (2.0/3.0)));
// Draw an Astroid
if(astroidEq1 > 0.0 || astroidEq2 > 0.0 || astroidEq3 > 0.0 || astroidEq4 > 0.0) {
discard;
}
return color;
}
// FIGURE 8 - PAC-MAN
vec4 pacman(vec2 posToDraw, vec4 color) {
float dist = distance(vec2(0.0), posToDraw);
float theta = acos(posToDraw.x / dist);
float pi = 3.1415926535;
float angle1 = pi/4.0;
float angle2 = -pi/4.0;
if(dist > 1.0 || ((theta > -pi/6.0) && (theta < pi/6.0))) {
discard;
}
return color;
}
// FIGURE 9 - THREE LEAVED CLOVER
vec4 threeLeavedClover(vec2 posToDraw, vec4 color) {
float extRadio = 100.0 * (pow(posToDraw.x, 4.0) + (2.0 * pow(posToDraw.x, 2.0) * pow(posToDraw.y, 2.0)) + pow(posToDraw.y, 4.0) - pow(posToDraw.x, 3.0) + 3.0 * posToDraw.x * pow(posToDraw.y, 2.0));
if(0.0 < extRadio) {
discard;
}
else {
return color;
}
}
// FIGURE 10 - DONUT/TORUS (WITHOUT SOME EDGES)
vec4 donut2(vec2 posToDraw, vec4 color) {
float dist = distance(vec2(0.0, 0.0), posToDraw);
float theta = acos(posToDraw.x/dist);
float phi = 3.1415926/20.0;
float firstFactor = 0.0;
float secondFactor = 1.0;
for(int i = 0; i < 23; i++) {
if(secondFactor < 21.0 && secondFactor < 22.0) {
vec2 coodinatesInterval = vec2((firstFactor * phi), (secondFactor * phi));
// Excluding some angles using a theta = (PI/20)
if(dist > 1.0 || dist < 0.5 || (theta > coodinatesInterval.x && theta < coodinatesInterval.y && posToDraw.y > 0.0)) {
discard;
}
}
firstFactor += 2.0;
secondFactor += 2.0;
}
firstFactor = 1.0;
secondFactor = 2.0;
for(int i = 0; i < 23; i++) {
if(secondFactor < 21.0 && secondFactor < 22.0) {
vec2 coodinatesInterval = vec2((firstFactor * phi), (secondFactor * phi));
// Excluding some angles using a theta = (PI/20)
if(dist > 1.0 || dist < 0.5 || (theta > coodinatesInterval.x && theta < coodinatesInterval.y && posToDraw.y < 0.0)) {
discard;
}
}
firstFactor += 2.0;
secondFactor += 2.0;
}
return color;
}
mat2 rotate2d(float _angle) {
return mat2(cos(_angle), -sin(_angle), sin(_angle), cos(_angle));
}
void main() {
float theta = time * fBlurDirection.y * fSizeFigureSpeed.z;
vec2 rotatedPoint = rotate2d(theta) * getPos(gl_PointCoord);
bool blur = (fBlurDirection.x == 1.0) ? true : false;
// FIGURES WITH BLUR EFFECT
// Square
if(fSizeFigureSpeed.y <= 0.1) {
gl_FragColor = square(rotatedPoint, fColor, blur);
}
// Circle
else if(fSizeFigureSpeed.y <= 1.1) {
gl_FragColor = circle(rotatedPoint, fColor, blur);
}
// Cross
else if(fSizeFigureSpeed.y <= 2.1) {
gl_FragColor = cross(rotatedPoint, fColor, blur);
}
// Donut/Torus (Normal)
else if(fSizeFigureSpeed.y <= 3.1) {
gl_FragColor = donut1(rotatedPoint, fColor, blur);
}
// Heart
else if (fSizeFigureSpeed.y <= 4.1) {
gl_FragColor = heart(rotatedPoint, fColor, blur);
}
// Frame
else if (fSizeFigureSpeed.y <= 5.1) {
gl_FragColor = frame(rotatedPoint, fColor, blur);
}
// FIGURES WITHOUT BLUR EFFECT
// Astroid
else if (fSizeFigureSpeed.y <= 6.1) {
gl_FragColor = astroid(rotatedPoint, fColor);
}
// Pac-Man
else if (fSizeFigureSpeed.y <= 7.1) {
gl_FragColor = pacman(rotatedPoint, fColor);
}
// Three Leaved Clover
else if (fSizeFigureSpeed.y <= 8.1) {
gl_FragColor = threeLeavedClover(rotatedPoint, fColor);
}
// Donut/Torus (Without some Edges)
else if (fSizeFigureSpeed.y <= 9.1) {
gl_FragColor = donut2(rotatedPoint, fColor);
}
}
</script>
<script type="text/javascript" src="common/webgl-utils.js"></script>
<script type="text/javascript" src="common/initShaders.js"></script>
<script type="text/javascript" src="common/MV.js"></script>
<script type="text/javascript" src="2d-rotative-shapes-dance.js"></script>
</head>
<body>
<title>The Rotative Shapes' Dance</title>
<br>
<div id="container" style="display: inline-block; vertical-align: top">
<canvas id="gl-canvas" width="1200" height="540" style="border-radius: 5px;">
Oops... your browser doesn't support the HTML5 canvas element"
</canvas>
</div>
<br/>
<br/>
<div id="workDescription">
<h2>
<a href="https://www.fct.unl.pt/en/education/course/integrated-master-computer-science">
Computer Science and Engineering
<br/>
Integrated Master
</a>
</h2>
<h3>
@ <a href="https://www.fct.unl.pt/en"><i>FCT NOVA | FCT/UNL
<br/>
(Faculty of Sciences and Technology of New University of Lisbon)</i></a>
</h3>
<br/>
<h3>
<a href="http://www.unl.pt/guia/2018/fct/UNLGI_getUC?uc=8150">
Computer Graphics and Interfaces
</a>
<br/>
(2017/2018)
</h3>
<h4>
Lab Work 1 (Rotative Shapes' Dance)
</h4>
</div>
<div id="authorsInfo">
<h2>
Authors/Contributors
</h2>
<h3>
<u><i>Rúben André Barreiro</i></u>
</h3>
<h4>
no. 42648 (<a href="mailto:r.barreiro@campus.fct.unl.pt">r.barreiro@campus.fct.unl.pt</a>)
</h4>
</div>
<div id="instructions">
<h2>
Instructions
</h2>
<font size="2">
- Click anywhere in the canvas to create a <i><b>Rotative Shape</b></i>;
<br/>
- Choose the current <i>Shape's color</i>, by adjusting the <i>colors' factors</i>;
<br/>
- Choose the current <i>Geometric Shape</i> in use;
<br/>
- Choose the option to allow <i>Blur Edges</i>;
<br/>
- Choose the current direction (<i>Clock Direction</i> or the <i>opposite</i>) of the <i>Geometric Shape</i>;
<br/>
<br/>
</font>
</div>
<div id="settings">
<h2>
Settings/Adjustments
</h2>
<b>Colors' Factors Available:</b>
<br>
<dt><font color="red"><b>Red</b></font></dt><b>0%</b> <input id="redFactor" type="range" min="0.00" max="1.00" step="0.01" value="0.00"> <b>100%</b>
<br>
<dt><font color="green"><b>Green</b></font></dt><b>0%</b> <input id="greenFactor" type="range" min="0.00" max="1.00" step="0.01" value="0.00"> <b>100%</b>
<br>
<dt><font color="blue"><b>Blue</b></font> </dt><b>0%</b> <input id="blueFactor" type="range" min="0.00" max="1.00" step="0.01" value="0.00"> <b>100%</b>
<br>
<dt><b>Alpha</b> </dt><b>0%</b> <input id="alphaFactor" type="range" min="0.00" max="1.00" step="0.01" value="1.00"> <b>100%</b>
<br>
<br>
<b>Color Preview:</b>
<br>
<div id="colorPreview" class="color">
<!-- Color Preview Panel -->
</div>
<br>
<br>
<b>Geometric Figures/Shapes Available:</b>
<br>
<select id="figureInUse">
<option value = 0> Square </option>
<option value = 1> Circle </option>
<option value = 2> Cross </option>
<option value = 3> Donut/Torus </option>
<option value = 4> Heart </option>
<option value = 5> Frame </option>
<option value = 6> Astroid (No Blur Effect) </option>
<option value = 7> Pac-Man (No Blur Effect) </option>
<option value = 8> Three Leaved Clover (No Blur Effect) </option>
<option value = 9> Donut/Torus without some Edges (No Blur Effect) </option>
</select>
<br>
<br>
<b>Auto Generation of Points:</b>
<br>
<input type="button" id="autoButtonClick" value="Off">
<br>
<br>
<div id="blurOption">
<b>Blur Effect Option:</b>
<br>
<input type="radio" name="blurEffectRadios" value="true"> Yes
<br>
<input type="radio" name="blurEffectRadios" value="false" checked="checked"> No
<br>
<br>
</div>
<b>Rotation Direction:</b>
<br>
<input type="radio" name="rotationDirectionsRadios" value="clockDirection" checked="checked"> Clock Direction
<br>
<input type="radio" name="rotationDirectionsRadios" value="inverseClockDirection"> Inverse Clock Direction
<br/>
<br/>
</div>
</body>
</html>