<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>water.vert Example File | Qt 3D 5.9</title>
<link rel="stylesheet" type="text/css" href="style/offline-simple.css" />
<script type="text/javascript">
document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css");
// loading style sheet breaks anchors that were jumped to before
// so force jumping to anchor again
setTimeout(function() {
var anchor = location.hash;
// need to jump to different anchor first (e.g. none)
location.hash = "#";
setTimeout(function() {
location.hash = anchor;
}, 0);
}, 0);
</script>
</head>
<body>
<div class="header" id="qtdocheader">
<div class="main">
<div class="main-rounded">
<div class="navigationbar">
<table><tr>
<td >Qt 5.9</td><td ><a href="qt3d-index.html">Qt 3D</a></td><td ><a href="qt3d-advancedcustommaterial-example.html">Qt 3D: Advanced custom material QML Example</a></td><td >water.vert Example File</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
</tr></table>
</div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">water.vert Example File</h1>
<span class="subtitle">advancedcustommaterial/shaders/es2/water.vert</span>
<!-- $$$advancedcustommaterial/shaders/es2/water.vert-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
#define FP highp
attribute FP vec3 vertexPosition;
attribute FP vec3 vertexNormal;
attribute FP vec2 vertexTexCoord;
attribute FP vec4 vertexTangent;
varying FP vec3 worldPosition;
varying FP vec2 texCoord;
varying FP vec2 movtexCoord;
varying FP vec2 multexCoord;
varying FP vec2 waveTexCoord;
varying FP vec2 skyTexCoord;
varying FP mat3 tangentMatrix;
varying FP vec3 vpos;
uniform FP mat4 modelMatrix;
uniform FP mat3 modelNormalMatrix;
uniform FP mat4 mvp;
uniform FP float offsetx;
uniform FP float offsety;
uniform FP float vertYpos;
uniform FP float texCoordScale;
uniform FP float waveheight;
uniform FP float waveRandom;
void main()
{
// Scale texture coordinates for for fragment shader
texCoord = vertexTexCoord * texCoordScale;
movtexCoord = vertexTexCoord * texCoordScale;
multexCoord = vertexTexCoord * (texCoordScale*0.5);
waveTexCoord = vertexTexCoord * (texCoordScale * 6.0);
skyTexCoord = vertexTexCoord * (texCoordScale * 0.2);
// Add Animated x and y Offset to SKY, MOV and MUL texCoords
movtexCoord = vec2(texCoord.x+offsetx,texCoord.y+offsety);
multexCoord = vec2(texCoord.x-offsetx,texCoord.y+offsety);
skyTexCoord = vec2(texCoord.x-(offsetx/2.0),texCoord.y-(offsety/2.0));
// Transform position, normal, and tangent to world coords
worldPosition = vec3(modelMatrix * vec4(vertexPosition, 1.0));
FP vec3 normal = normalize(modelNormalMatrix * vertexNormal);
FP vec3 tangent = normalize(vec3(modelMatrix * vec4(vertexTangent.xyz, 0.0)));
// Make the tangent truly orthogonal to the normal by using Gram-Schmidt.
// This allows to build the tangentMatrix below by simply transposing the
// tangent -> world space matrix (which would now be orthogonal)
tangent = normalize(tangent - dot(tangent, normal) * normal);
// Calculate binormal vector. No "real" need to renormalize it,
// as built by crossing two normal vectors.
// To orient the binormal correctly, use the fourth coordinate of the tangent,
// which is +1 for a right hand system, and -1 for a left hand system.
FP vec3 binormal = cross(normal, tangent) * vertexTangent.w;
// Construct matrix to transform from eye coords to tangent space
tangentMatrix = mat3(
tangent.x, binormal.x, normal.x,
tangent.y, binormal.y, normal.y,
tangent.z, binormal.z, normal.z);
// Calculate animated vertex positions
FP float sinPos = (vertexPosition.z)+(vertexPosition.x);
FP float sinPos2 = (vertexPosition.y/2.0)+(vertexPosition.z);
FP vec3 vertMod = vec3(vertexPosition.x,vertexPosition.y,vertexPosition.z);
vertMod = vec3(vertMod.x+=sin(vertYpos*2.2-sinPos2)*waveheight,
vertMod.y=sin(vertYpos*2.2+sinPos)*waveheight,
vertMod.z-=sin(vertYpos*2.2-cos(sinPos2))*waveheight);
FP vec3 vertModCom = vec3(vertMod.x+=cos(vertYpos*2.2-cos(sinPos2))*waveheight,
vertMod.y=sin(vertYpos*2.2+cos(sinPos))*waveheight,
vertMod.z-=cos(vertYpos*2.2-cos(sinPos))*waveheight);
// Add wave animation only to vertices above world pos.y zero
if(vertexPosition.y < 0.0){vertModCom = vertexPosition;}
else{vertModCom = vertModCom;}
vpos = vertModCom;
// Calculate vertex position in clip coordinates
gl_Position = mvp * vec4(vertModCom, 1.0);
}
</pre>
</div>
<!-- @@@advancedcustommaterial/shaders/es2/water.vert -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners. </p>
</div>
</body>
</html>
