From 63d417d4ee7611d6453289db62b82da9ac0a39a5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Antti=20M=C3=A4=C3=A4tt=C3=A4?= <antti.maatta@qt.io>
Date: Mon, 6 Feb 2017 13:41:56 +0200
Subject: Add advanced custom material example

Change-Id: I6c5ae0e29960aaab2d0babfe325a9f6483729600
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
---
 .../advancedcustommaterial/shaders/gl3/water.vert  | 88 ++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 examples/qt3d/advancedcustommaterial/shaders/gl3/water.vert

(limited to 'examples/qt3d/advancedcustommaterial/shaders/gl3/water.vert')

diff --git a/examples/qt3d/advancedcustommaterial/shaders/gl3/water.vert b/examples/qt3d/advancedcustommaterial/shaders/gl3/water.vert
new file mode 100644
index 000000000..a4ddcf62b
--- /dev/null
+++ b/examples/qt3d/advancedcustommaterial/shaders/gl3/water.vert
@@ -0,0 +1,88 @@
+#version 150 core
+
+in vec3 vertexPosition;
+in vec3 vertexNormal;
+in vec2 vertexTexCoord;
+in vec4 vertexTangent;
+
+out vec3 worldPosition;
+out vec2 texCoord;
+out vec2 movtexCoord;
+out vec2 multexCoord;
+out vec2 waveTexCoord;
+out vec2 skyTexCoord;
+out mat3 tangentMatrix;
+out vec3 vpos;
+
+uniform mat4 modelMatrix;
+uniform mat3 modelNormalMatrix;
+uniform mat4 mvp;
+
+uniform float offsetx;
+uniform float offsety;
+uniform float vertYpos;
+uniform float texCoordScale;
+uniform float waveheight;
+uniform 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);
+    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),texCoord.y-(offsety/2));
+
+    // Transform position, normal, and tangent to world coords
+    worldPosition = vec3(modelMatrix * vec4(vertexPosition, 1.0));
+    vec3 normal = normalize(modelNormalMatrix * vertexNormal);
+    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.
+    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
+
+    float sinPos = (vertexPosition.z)+(vertexPosition.x);
+    float sinPos2 = (vertexPosition.y/2)+(vertexPosition.z);
+    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);
+
+    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);
+}
-- 
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