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move texture to GeometryEngine

This commit is contained in:
Anakin 2016-12-29 13:37:15 +01:00
parent faea3b0737
commit 0499982150
6 changed files with 99 additions and 203 deletions
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70
QtMeshViewer/Header/GeometryEngine.h
View File

@ -1,73 +1,25 @@
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef GEOMETRYENGINE_H
#define GEOMETRYENGINE_H
#pragma once
#include <QOpenGLFunctions>
#include <QOpenGLShaderProgram>
#include <QOpenGLBuffer>
#include <QOpenGLTexture>
class GeometryEngine : protected QOpenGLFunctions
{
public:
GeometryEngine();
virtual ~GeometryEngine();
GeometryEngine();
virtual ~GeometryEngine();
void drawCubeGeometry(QOpenGLShaderProgram *program);
void drawGeometry(QOpenGLShaderProgram *program);
private:
void initCubeGeometry();
void initCubeGeometry();
void initTexture();
QOpenGLBuffer arrayBuf;
QOpenGLBuffer indexBuf;
QOpenGLBuffer arrayBuf;
QOpenGLBuffer indexBuf;
QOpenGLTexture *texture;
};
#endif // GEOMETRYENGINE_H

9
QtMeshViewer/Header/OglViewerWidget.h
View File

@ -9,7 +9,7 @@
#include <QVector2D>
#include <QBasicTimer>
#include <QOpenGLShaderProgram>
#include <QOpenGLTexture>
class GeometryEngine;
@ -31,8 +31,8 @@ protected:
void resizeGL(int w, int h) Q_DECL_OVERRIDE;
void paintGL() Q_DECL_OVERRIDE;
private:
void initShaders();
void initTextures();
private:
struct {
@ -40,10 +40,9 @@ private:
bool right = false;
QVector2D position;
} m_mouse;
QOpenGLShaderProgram program;
GeometryEngine *geometries;
QOpenGLTexture *texture;
QOpenGLShaderProgram m_program;
GeometryEngine *m_dataEngine;
QMatrix4x4 m_projection;
QQuaternion m_rotation;

3
QtMeshViewer/Resources/fshader.glsl
View File

@ -8,11 +8,8 @@ uniform sampler2D texture;
varying vec2 v_texcoord;
//! [0]
void main()
{
// Set fragment color from texture
gl_FragColor = texture2D(texture, v_texcoord);
}
//! [0]

2
QtMeshViewer/Resources/vshader.glsl
View File

@ -11,7 +11,6 @@ attribute vec2 a_texcoord;
varying vec2 v_texcoord;
//! [0]
void main()
{
// Calculate vertex position in screen space
@ -21,4 +20,3 @@ void main()
// Value will be automatically interpolated to fragments inside polygon faces
v_texcoord = a_texcoord;
}
//! [0]

169
QtMeshViewer/Source/GeometryEngine.cpp
View File

@ -1,90 +1,41 @@
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "..\Header\GeometryEngine.h"
#include <QVector2D>
#include <QVector3D>
struct VertexData
{
QVector3D position;
QVector2D texCoord;
QVector3D position;
QVector2D texCoord;
};
//! [0]
GeometryEngine::GeometryEngine()
: indexBuf(QOpenGLBuffer::IndexBuffer)
: indexBuf(QOpenGLBuffer::IndexBuffer)
, texture(Q_NULLPTR)
{
initializeOpenGLFunctions();
initializeOpenGLFunctions();
// Generate 2 VBOs
arrayBuf.create();
indexBuf.create();
// Generate 2 VBOs
arrayBuf.create();
indexBuf.create();
// Initializes cube geometry and transfers it to VBOs
initCubeGeometry();
// Initializes cube geometry and transfers it to VBOs
initCubeGeometry();
}
GeometryEngine::~GeometryEngine()
{
arrayBuf.destroy();
indexBuf.destroy();
arrayBuf.destroy();
indexBuf.destroy();
delete texture;
}
//! [0]
void GeometryEngine::initCubeGeometry()
{
// For cube we would need only 8 vertices but we have to
// duplicate vertex for each face because texture coordinate
// is different.
// For cube we would need only 8 vertices but we have to
// duplicate vertex for each face because texture coordinate
// is different.
VertexData vertices[] = {
// Vertex data for face 0
{QVector3D(-1.0f, -1.0f, 1.0f), QVector2D(0.0f, 0.0f)}, // v0
@ -131,49 +82,73 @@ void GeometryEngine::initCubeGeometry()
// connecting strips have same vertex order then only last
// index of the first strip needs to be duplicated.
GLushort indices[] = {
0, 1, 2, 3, 3, // Face 0 - triangle strip ( v0, v1, v2, v3)
4, 4, 5, 6, 7, 7, // Face 1 - triangle strip ( v4, v5, v6, v7)
8, 8, 9, 10, 11, 11, // Face 2 - triangle strip ( v8, v9, v10, v11)
12, 12, 13, 14, 15, 15, // Face 3 - triangle strip (v12, v13, v14, v15)
16, 16, 17, 18, 19, 19, // Face 4 - triangle strip (v16, v17, v18, v19)
20, 20, 21, 22, 23 // Face 5 - triangle strip (v20, v21, v22, v23)
0,1,2, //vorne (4)
3,2,1,
4,5,7, //rechts (1)
6,4,7,
8,9,11, //hinten (3)*
8,11,10,
14,12,13, //links (6)*
14,13,15,
18,16,17, //unten (5)
19,18,17,
23,22,20, //oben (2)*
23,20,21
};
//! [1]
// Transfer vertex data to VBO 0
arrayBuf.bind();
arrayBuf.allocate(vertices, 24 * sizeof(VertexData));
// Transfer index data to VBO 1
indexBuf.bind();
indexBuf.allocate(indices, 34 * sizeof(GLushort));
//! [1]
indexBuf.allocate(indices, 36 * sizeof(GLushort));
initTexture();
}
//! [2]
void GeometryEngine::drawCubeGeometry(QOpenGLShaderProgram *program)
void GeometryEngine::initTexture()
{
// Tell OpenGL which VBOs to use
arrayBuf.bind();
indexBuf.bind();
// Load cube.png image
texture = new QOpenGLTexture(QImage(":images/cube.png").mirrored());
// Offset for position
quintptr offset = 0;
// Set nearest filtering mode for texture minification
texture->setMinificationFilter(QOpenGLTexture::Nearest);
// Tell OpenGL programmable pipeline how to locate vertex position data
int vertexLocation = program->attributeLocation("a_position");
program->enableAttributeArray(vertexLocation);
program->setAttributeBuffer(vertexLocation, GL_FLOAT, offset, 3, sizeof(VertexData));
// Set bilinear filtering mode for texture magnification
texture->setMagnificationFilter(QOpenGLTexture::Linear);
// Offset for texture coordinate
offset += sizeof(QVector3D);
// Tell OpenGL programmable pipeline how to locate vertex texture coordinate data
int texcoordLocation = program->attributeLocation("a_texcoord");
program->enableAttributeArray(texcoordLocation);
program->setAttributeBuffer(texcoordLocation, GL_FLOAT, offset, 2, sizeof(VertexData));
// Draw cube geometry using indices from VBO 1
glDrawElements(GL_TRIANGLE_STRIP, 34, GL_UNSIGNED_SHORT, 0);
// Wrap texture coordinates by repeating
// f.ex. texture coordinate (1.1, 1.2) is same as (0.1, 0.2)
texture->setWrapMode(QOpenGLTexture::Repeat);
}
void GeometryEngine::drawGeometry(QOpenGLShaderProgram *program)
{
// Tell OpenGL which VBOs to use
arrayBuf.bind();
indexBuf.bind();
texture->bind();
// Use texture unit 0 which contains cube.png
program->setUniformValue("texture", 0);
// Offset for position
quintptr offset = 0;
// Tell OpenGL programmable pipeline how to locate vertex position data
int vertexLocation = program->attributeLocation("a_position");
program->enableAttributeArray(vertexLocation);
program->setAttributeBuffer(vertexLocation, GL_FLOAT, offset, 3, sizeof(VertexData));
// Offset for texture coordinate
offset += sizeof(QVector3D);
// Tell OpenGL programmable pipeline how to locate vertex texture coordinate data
int texcoordLocation = program->attributeLocation("a_texcoord");
program->enableAttributeArray(texcoordLocation);
program->setAttributeBuffer(texcoordLocation, GL_FLOAT, offset, 2, sizeof(VertexData));
// Draw cube geometry using indices from VBO 1
glDrawElements(GL_TRIANGLES, 36, GL_UNSIGNED_SHORT, 0);
}
//! [2]

49
QtMeshViewer/Source/OglViewerWidget.cpp
View File

@ -2,12 +2,10 @@
#include <QMouseEvent>
#include <math.h>
#include <iostream>
OglViewerWidget::OglViewerWidget(QWidget *parent) :
QOpenGLWidget(parent),
geometries(0),
texture(0)
m_dataEngine(0)
{
setFocus();
}
@ -17,8 +15,7 @@ OglViewerWidget::~OglViewerWidget()
// Make sure the context is current when deleting the texture
// and the buffers.
makeCurrent();
delete texture;
delete geometries;
delete m_dataEngine;
doneCurrent();
}
@ -75,7 +72,6 @@ void OglViewerWidget::initializeGL()
glClearColor(0, 0, 0, 1);
initShaders();
initTextures();
// Enable depth buffer
glEnable(GL_DEPTH_TEST);
@ -83,45 +79,29 @@ void OglViewerWidget::initializeGL()
// Enable back face culling
glEnable(GL_CULL_FACE);
geometries = new GeometryEngine;
m_dataEngine = new GeometryEngine;
}
void OglViewerWidget::initShaders()
{
// Compile vertex shader
if (!program.addShaderFromSourceFile(QOpenGLShader::Vertex, ":/shaders/vshader.glsl"))
if (!m_program.addShaderFromSourceFile(QOpenGLShader::Vertex, ":/shaders/vshader.glsl"))
close();
// Compile fragment shader
if (!program.addShaderFromSourceFile(QOpenGLShader::Fragment, ":/shaders/fshader.glsl"))
if (!m_program.addShaderFromSourceFile(QOpenGLShader::Fragment, ":/shaders/fshader.glsl"))
close();
// Link shader pipeline
if (!program.link())
if (!m_program.link())
close();
// Bind shader pipeline for use
if (!program.bind())
if (!m_program.bind())
close();
}
void OglViewerWidget::initTextures()
{
// Load cube.png image
texture = new QOpenGLTexture(QImage(":images/cube.png").mirrored());
// Set nearest filtering mode for texture minification
texture->setMinificationFilter(QOpenGLTexture::Nearest);
// Set bilinear filtering mode for texture magnification
texture->setMagnificationFilter(QOpenGLTexture::Linear);
// Wrap texture coordinates by repeating
// f.ex. texture coordinate (1.1, 1.2) is same as (0.1, 0.2)
texture->setWrapMode(QOpenGLTexture::Repeat);
}
void OglViewerWidget::resizeGL(int w, int h)
{
// Calculate aspect ratio
@ -142,19 +122,14 @@ void OglViewerWidget::paintGL()
// Clear color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
texture->bind();
// Calculate model view transformation
QMatrix4x4 matrix;
matrix.translate(0.0, 0.0, -5.0);
matrix.rotate(m_rotation);
QMatrix4x4 view;
view.translate(0.0, 0.0, -5.0);
view.rotate(m_rotation);
// Set modelview-projection matrix
program.setUniformValue("mvp_matrix", m_projection * matrix);
// Use texture unit 0 which contains cube.png
program.setUniformValue("texture", 0);
m_program.setUniformValue("mvp_matrix", m_projection * view);
// Draw cube geometry
geometries->drawCubeGeometry(&program);
m_dataEngine->drawGeometry(&m_program);
}