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Diffstat (limited to 'src/imports/particles/deformableparticle.cpp')
| -rw-r--r-- | src/imports/particles/deformableparticle.cpp | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/src/imports/particles/deformableparticle.cpp b/src/imports/particles/deformableparticle.cpp new file mode 100644 index 0000000000..176ef2b238 --- /dev/null +++ b/src/imports/particles/deformableparticle.cpp @@ -0,0 +1,438 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Declarative module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <private/qsgcontext_p.h> +#include <private/qsgadaptationlayer_p.h> +#include <qsgnode.h> +#include <qsgtexturematerial.h> +#include <qsgtexture.h> +#include <QFile> +#include "deformableparticle.h" +#include <QGLFunctions> +#include <qsgengine.h> + +QT_BEGIN_NAMESPACE + +const float CONV = 0.017453292519943295; +class DeformableParticleMaterial : public QSGMaterial +{ +public: + DeformableParticleMaterial() + : timestamp(0) + { + setFlag(Blending, true); + } + + ~DeformableParticleMaterial() + { + delete texture; + } + + virtual QSGMaterialType *type() const { static QSGMaterialType type; return &type; } + virtual QSGMaterialShader *createShader() const; + virtual int compare(const QSGMaterial *other) const + { + return this - static_cast<const DeformableParticleMaterial *>(other); + } + + QSGTexture *texture; + + qreal timestamp; +}; + + +class DeformableParticleMaterialData : public QSGMaterialShader +{ +public: + DeformableParticleMaterialData(const char *vertexFile = 0, const char *fragmentFile = 0) + { + QFile vf(vertexFile ? vertexFile : ":resources/deformablevertex.shader"); + vf.open(QFile::ReadOnly); + m_vertex_code = vf.readAll(); + + QFile ff(fragmentFile ? fragmentFile : ":resources/deformablefragment.shader"); + ff.open(QFile::ReadOnly); + m_fragment_code = ff.readAll(); + + Q_ASSERT(!m_vertex_code.isNull()); + Q_ASSERT(!m_fragment_code.isNull()); + } + + void deactivate() { + QSGMaterialShader::deactivate(); + + for (int i=0; i<8; ++i) { + m_program.setAttributeArray(i, GL_FLOAT, chunkOfBytes, 1, 0); + } + } + + virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *) + { + DeformableParticleMaterial *m = static_cast<DeformableParticleMaterial *>(newEffect); + state.context()->functions()->glActiveTexture(GL_TEXTURE0); + m->texture->bind(); + + m_program.setUniformValue(m_opacity_id, state.opacity()); + m_program.setUniformValue(m_timestamp_id, (float) m->timestamp); + + if (state.isMatrixDirty()) + m_program.setUniformValue(m_matrix_id, state.combinedMatrix()); + } + + virtual void initialize() { + m_matrix_id = m_program.uniformLocation("matrix"); + m_opacity_id = m_program.uniformLocation("opacity"); + m_timestamp_id = m_program.uniformLocation("timestamp"); + } + + virtual const char *vertexShader() const { return m_vertex_code.constData(); } + virtual const char *fragmentShader() const { return m_fragment_code.constData(); } + + virtual char const *const *attributeNames() const { + static const char *attr[] = { + "vPos", + "vTex", + "vData", + "vVec", + "vDeformVec", + "vRotation", + 0 + }; + return attr; + } + + virtual bool isColorTable() const { return false; } + + int m_matrix_id; + int m_opacity_id; + int m_timestamp_id; + + QByteArray m_vertex_code; + QByteArray m_fragment_code; + + static float chunkOfBytes[1024]; +}; +float DeformableParticleMaterialData::chunkOfBytes[1024]; + + +QSGMaterialShader *DeformableParticleMaterial::createShader() const +{ + return new DeformableParticleMaterialData; +} + +struct DeformableParticleVertex { + float x; + float y; + float tx; + float ty; + float t; + float lifeSpan; + float size; + float endSize; + float sx; + float sy; + float ax; + float ay; + float xx; + float xy; + float yx; + float yy; + float rotation; + float rotationSpeed; + float autoRotate;//Assume that GPUs prefer floats to bools +}; + +struct DeformableParticleVertices { + DeformableParticleVertex v1; + DeformableParticleVertex v2; + DeformableParticleVertex v3; + DeformableParticleVertex v4; +}; + + +DeformableParticle::DeformableParticle(QSGItem* parent) + : ParticleType(parent) + , m_do_reset(false) + , m_rotation(0) + , m_autoRotation(false) + , m_xVector(0) + , m_yVector(0) + , m_rotationVariation(0) + , m_rotationSpeed(0) + , m_rotationSpeedVariation(0) +{ + setFlag(ItemHasContents); +} + +void DeformableParticle::setImage(const QUrl &image) +{ + if (image == m_image) + return; + m_image = image; + emit imageChanged(); + reset(); +} + +void DeformableParticle::setCount(int c) +{ + ParticleType::setCount(c); + m_pleaseReset = true; +} + +void DeformableParticle::reset() +{ + ParticleType::reset(); + m_pleaseReset = true; +} + +static QSGGeometry::Attribute DeformableParticle_Attributes[] = { + { 0, 2, GL_FLOAT }, // Position + { 1, 2, GL_FLOAT }, // TexCoord + { 2, 4, GL_FLOAT }, // Data + { 3, 4, GL_FLOAT }, // Vectors + { 4, 4, GL_FLOAT }, // DeformationVectors + { 5, 3, GL_FLOAT } // Rotation +}; + +static QSGGeometry::AttributeSet DeformableParticle_AttributeSet = +{ + 6, // Attribute Count + (2 + 2 + 4 + 4 + 4 + 3) * sizeof(float), + DeformableParticle_Attributes +}; + +QSGGeometryNode* DeformableParticle::buildParticleNode() +{ + if (m_count * 4 > 0xffff) { + printf("DeformableParticle: Too many particles... \n"); + return 0; + } + + if(m_count <= 0) { + printf("DeformableParticle: Too few particles... \n"); + return 0; + } + + QImage image(m_image.toLocalFile()); + if (image.isNull()) { + printf("DeformableParticle: loading image failed... '%s'\n", qPrintable(m_image.toLocalFile())); + return 0; + } + + int vCount = m_count * 4; + int iCount = m_count * 6; + + QSGGeometry *g = new QSGGeometry(DeformableParticle_AttributeSet, vCount, iCount); + g->setDrawingMode(GL_TRIANGLES); + + DeformableParticleVertex *vertices = (DeformableParticleVertex *) g->vertexData(); + for (int p=0; p<m_count; ++p) { + + for (int i=0; i<4; ++i) { + vertices[i].x = 0; + vertices[i].y = 0; + vertices[i].t = -1; + vertices[i].lifeSpan = 0; + vertices[i].size = 0; + vertices[i].endSize = 0; + vertices[i].sx = 0; + vertices[i].sy = 0; + vertices[i].ax = 0; + vertices[i].ay = 0; + vertices[i].xx = 1; + vertices[i].xy = 0; + vertices[i].yx = 0; + vertices[i].yy = 1; + vertices[i].rotation = 0; + vertices[i].rotationSpeed = 0; + vertices[i].autoRotate = 0; + } + + vertices[0].tx = 0; + vertices[0].ty = 0; + + vertices[1].tx = 1; + vertices[1].ty = 0; + + vertices[2].tx = 0; + vertices[2].ty = 1; + + vertices[3].tx = 1; + vertices[3].ty = 1; + + vertices += 4; + } + + quint16 *indices = g->indexDataAsUShort(); + for (int i=0; i<m_count; ++i) { + int o = i * 4; + indices[0] = o; + indices[1] = o + 1; + indices[2] = o + 2; + indices[3] = o + 1; + indices[4] = o + 3; + indices[5] = o + 2; + indices += 6; + } + + if (m_material) { + delete m_material; + m_material = 0; + } + + if (!m_material) + m_material = new DeformableParticleMaterial(); + + + m_material->texture = sceneGraphEngine()->createTextureFromImage(image); + m_material->texture->setFiltering(QSGTexture::Linear); + + m_node = new QSGGeometryNode(); + m_node->setGeometry(g); + m_node->setMaterial(m_material); + + m_last_particle = 0; + + return m_node; +} + +QSGNode *DeformableParticle::updatePaintNode(QSGNode *, UpdatePaintNodeData *) +{ + if(m_pleaseReset){ + if(m_node) + delete m_node; + if(m_material) + delete m_material; + + m_node = 0; + m_material = 0; + m_pleaseReset = false; + } + + if(m_system && m_system->isRunning()) + prepareNextFrame(); + if (m_node){ + update(); + m_node->markDirty(QSGNode::DirtyMaterial); + } + + return m_node; +} + +void DeformableParticle::prepareNextFrame() +{ + if (m_node == 0){ //TODO: Staggered loading (as emitted) + m_node = buildParticleNode(); + if(m_node == 0) + return; + } + qint64 timeStamp = m_system->systemSync(this); + + qreal time = timeStamp / 1000.; + m_material->timestamp = time; + +} + + +void DeformableParticle::vertexCopy(DeformableParticleVertex &b,const ParticleVertex& a) +{ + b.x = a.x - m_systemOffset.x(); + b.y = a.y - m_systemOffset.y(); + b.t = a.t; + b.lifeSpan = a.lifeSpan; + b.size = a.size; + b.endSize = a.endSize; + b.sx = a.sx; + b.sy = a.sy; + b.ax = a.ax; + b.ay = a.ay; +} + +void DeformableParticle::reload(ParticleData *d) +{ + if (m_node == 0) + return; + + DeformableParticleVertices *particles = (DeformableParticleVertices *) m_node->geometry()->vertexData(); + + int pos = particleTypeIndex(d); + + DeformableParticleVertices &p = particles[pos]; + + //Perhaps we could be more efficient? + vertexCopy(p.v1, d->pv); + vertexCopy(p.v2, d->pv); + vertexCopy(p.v3, d->pv); + vertexCopy(p.v4, d->pv); + //TODO: Allow for change of deformation data? +} + +void DeformableParticle::load(ParticleData *d) +{ + if (m_node == 0) + return; + + //Deformation Initialization + DeformableParticleVertices *particles = (DeformableParticleVertices *) m_node->geometry()->vertexData(); + DeformableParticleVertices &p = particles[particleTypeIndex(d)]; + if(m_xVector){ + const QPointF &ret = m_xVector->sample(QPointF(d->pv.x, d->pv.y)); + p.v1.xx = p.v2.xx = p.v3.xx = p.v4.xx = ret.x(); + p.v1.xy = p.v2.xy = p.v3.xy = p.v4.xy = ret.y(); + } + if(m_yVector){ + const QPointF &ret = m_yVector->sample(QPointF(d->pv.x, d->pv.y)); + p.v1.yx = p.v2.yx = p.v3.yx = p.v4.yx = ret.x(); + p.v1.yy = p.v2.yy = p.v3.yy = p.v4.yy = ret.y(); + } + p.v1.rotation = p.v2.rotation = p.v3.rotation = p.v4.rotation = + (m_rotation + (m_rotationVariation - 2*((qreal)rand()/RAND_MAX)*m_rotationVariation) ) * CONV; + p.v1.rotationSpeed = p.v2.rotationSpeed = p.v3.rotationSpeed = p.v4.rotationSpeed = + (m_rotationSpeed + (m_rotationSpeedVariation - 2*((qreal)rand()/RAND_MAX)*m_rotationSpeedVariation) ) * CONV; + p.v1.autoRotate = p.v2.autoRotate = p.v3.autoRotate = p.v4.autoRotate = m_autoRotation?1.0:0.0; + + vertexCopy(p.v1, d->pv); + vertexCopy(p.v2, d->pv); + vertexCopy(p.v3, d->pv); + vertexCopy(p.v4, d->pv); +} + +QT_END_NAMESPACE |