axmol/tests/cpp-tests/Classes/Sprite3DTest/DrawNode3D.cpp

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/****************************************************************************
Copyright (c) 2014 Chukong Technologies Inc.
http://www.cocos2d-x.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "DrawNode3D.h"
#include "CCGL.h"
#include "base/CCEventType.h"
#include "base/CCConfiguration.h"
#include "renderer/CCCustomCommand.h"
#include "renderer/CCRenderer.h"
#include "renderer/CCGLProgramState.h"
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#include "renderer/ccGLStateCache.h"
#include "base/CCDirector.h"
#include "base/CCEventListenerCustom.h"
#include "base/CCEventDispatcher.h"
NS_CC_BEGIN
DrawNode3D::DrawNode3D()
: _vao(0)
, _vbo(0)
, _bufferCapacity(0)
, _bufferCount(0)
, _buffer(nullptr)
, _dirty(false)
{
_blendFunc = BlendFunc::ALPHA_PREMULTIPLIED;
}
DrawNode3D::~DrawNode3D()
{
free(_buffer);
_buffer = nullptr;
glDeleteBuffers(1, &_vbo);
_vbo = 0;
if (Configuration::getInstance()->supportsShareableVAO())
{
glDeleteVertexArrays(1, &_vao);
GL::bindVAO(0);
_vao = 0;
}
}
DrawNode3D* DrawNode3D::create()
{
DrawNode3D* ret = new (std::nothrow) DrawNode3D();
if (ret && ret->init())
{
ret->autorelease();
}
else
{
CC_SAFE_DELETE(ret);
}
return ret;
}
void DrawNode3D::ensureCapacity(int count)
{
CCASSERT(count>=0, "capacity must be >= 0");
if(_bufferCount + count > _bufferCapacity)
{
_bufferCapacity += MAX(_bufferCapacity, count);
_buffer = (V3F_C4B*)realloc(_buffer, _bufferCapacity*sizeof(V3F_C4B));
}
}
bool DrawNode3D::init()
{
_blendFunc = BlendFunc::ALPHA_PREMULTIPLIED;
setGLProgramState(GLProgramState::getOrCreateWithGLProgramName(GLProgram::SHADER_NAME_POSITION_COLOR));
ensureCapacity(512);
if (Configuration::getInstance()->supportsShareableVAO())
{
glGenVertexArrays(1, &_vao);
GL::bindVAO(_vao);
}
glGenBuffers(1, &_vbo);
glBindBuffer(GL_ARRAY_BUFFER, _vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(V3F_C4B)* _bufferCapacity, _buffer, GL_STREAM_DRAW);
glEnableVertexAttribArray(GLProgram::VERTEX_ATTRIB_POSITION);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 3, GL_FLOAT, GL_FALSE, sizeof(V3F_C4B), (GLvoid *)offsetof(V3F_C4B, vertices));
glEnableVertexAttribArray(GLProgram::VERTEX_ATTRIB_COLOR);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(V3F_C4B), (GLvoid *)offsetof(V3F_C4B, colors));
glBindBuffer(GL_ARRAY_BUFFER, 0);
if (Configuration::getInstance()->supportsShareableVAO())
{
GL::bindVAO(0);
}
CHECK_GL_ERROR_DEBUG();
_dirty = true;
#if CC_ENABLE_CACHE_TEXTURE_DATA
// Need to listen the event only when not use batchnode, because it will use VBO
auto listener = EventListenerCustom::create(EVENT_COME_TO_FOREGROUND, [this](EventCustom* event){
/** listen the event that coming to foreground on Android */
this->init();
});
_eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
#endif
return true;
}
void DrawNode3D::draw(Renderer *renderer, const Mat4 &transform, uint32_t flags)
{
_customCommand.init(_globalZOrder);
_customCommand.func = CC_CALLBACK_0(DrawNode3D::onDraw, this, transform, flags);
renderer->addCommand(&_customCommand);
}
void DrawNode3D::onDraw(const Mat4 &transform, uint32_t flags)
{
auto glProgram = getGLProgram();
glProgram->use();
glProgram->setUniformsForBuiltins(transform);
glEnable(GL_DEPTH_TEST);
GL::blendFunc(_blendFunc.src, _blendFunc.dst);
if (_dirty)
{
glBindBuffer(GL_ARRAY_BUFFER, _vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(V3F_C4B)*_bufferCapacity, _buffer, GL_STREAM_DRAW);
_dirty = false;
}
if (Configuration::getInstance()->supportsShareableVAO())
{
GL::bindVAO(_vao);
}
else
{
GL::enableVertexAttribs(GL::VERTEX_ATTRIB_FLAG_POS_COLOR_TEX);
glBindBuffer(GL_ARRAY_BUFFER, _vbo);
// vertex
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 3, GL_FLOAT, GL_FALSE, sizeof(V3F_C4B), (GLvoid *)offsetof(V3F_C4B, vertices));
// color
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(V3F_C4B), (GLvoid *)offsetof(V3F_C4B, colors));
}
glDrawArrays(GL_LINES, 0, _bufferCount);
glBindBuffer(GL_ARRAY_BUFFER, 0);
CC_INCREMENT_GL_DRAWN_BATCHES_AND_VERTICES(1,_bufferCount);
glDisable(GL_DEPTH_TEST);
CHECK_GL_ERROR_DEBUG();
}
void DrawNode3D::drawLine(const Vec3 &from, const Vec3 &to, const Color4F &color)
{
unsigned int vertex_count = 2;
ensureCapacity(vertex_count);
Color4B col = Color4B(color);
V3F_C4B a = {Vec3(from.x, from.y, from.z), col};
V3F_C4B b = {Vec3(to.x, to.y, to.z), col, };
V3F_C4B *lines = (V3F_C4B *)(_buffer + _bufferCount);
lines[0] = a;
lines[1] = b;
_bufferCount += vertex_count;
_dirty = true;
}
void DrawNode3D::drawCube(Vec3* vertices, const Color4F &color)
{
// front face
drawLine(vertices[0], vertices[1], color);
drawLine(vertices[1], vertices[2], color);
drawLine(vertices[2], vertices[3], color);
drawLine(vertices[3], vertices[0], color);
// back face
drawLine(vertices[4], vertices[5], color);
drawLine(vertices[5], vertices[6], color);
drawLine(vertices[6], vertices[7], color);
drawLine(vertices[7], vertices[4], color);
// edge
drawLine(vertices[0], vertices[7], color);
drawLine(vertices[1], vertices[6], color);
drawLine(vertices[2], vertices[5], color);
drawLine(vertices[3], vertices[4], color);
}
void DrawNode3D::clear()
{
_bufferCount = 0;
_dirty = true;
}
const BlendFunc& DrawNode3D::getBlendFunc() const
{
return _blendFunc;
}
void DrawNode3D::setBlendFunc(const BlendFunc &blendFunc)
{
_blendFunc = blendFunc;
}
NS_CC_END