Sometimes the live2d model shows darkness

Yongjxu

Could you tell me how to solve this problem

naotaro

Hi, Yongjxu .

Only this image information can't identify the cause .
Please tell me the detailed information .
( Your OS, development environment , SDK Version or Program code etc...)

I know the same thing will happen in the change of texture color in Unity .

>> Transparency and texture color change of Live2D

Yongjxu

IOS, use cocos2d-x3.5 with live2d 2.0.06_3.
As the image shows, the live2dSprite.cpp and live2dSprite.h is my code.

Yongjxu

Live2dSprite* Live2dSprite::createLive2dNode(const std::string& modelDir, const std::string& modelFileName, const cocos2d::Size &size)
{
Live2dSprite *sprite = new (std::nothrow) Live2dSprite(modelDir,modelFileName, size);
if (sprite)
{
sprite->autorelease();
return sprite;
}
CC_SAFE_DELETE(sprite);
return nullptr;

}

Live2dSprite::Live2dSprite(const std::string& modelDir,
const std::string& modelFileName,
const Size &size):
DrawNode(), touchMgr(nullptr),deviceToScreen(nullptr),
viewMatrix(nullptr), l2d_model(nullptr),_eventListener(nullptr),
l2d_size(size),_shadow(1.0),_isRenderShadow(false)
{
l2d_model = new LAppModel();
l2d_model->load(modelDir.c_str(), modelFileName.c_str());
model_width = l2d_model->getCanvasWidth();
model_height = l2d_model->getCanvasHeight();

touchMgr=new TouchManager();

deviceToScreen = new L2DMatrix44();

viewMatrix = new L2DViewMatrix();

//Size size=Director::getInstance()->getWinSize();

float width= l2d_size.width;
float height= l2d_size.height;
float ratio=(float)height/width;
float left = VIEW_LOGICAL_LEFT;
float right = VIEW_LOGICAL_RIGHT;
float bottom = -ratio;
float top = ratio;
_scale = _scaleX = 1.0f;

viewMatrix->setScreenRect(left,right,bottom,top);

float screenW=abs(left-right);
deviceToScreen->multTranslate(-width/2.0f,-height/2.0f );
deviceToScreen->multScale( screenW/width , -screenW/width );

viewMatrix->setMaxScale( VIEW_MAX_SCALE );
viewMatrix->setMinScale( VIEW_MIN_SCALE );


viewMatrix->setMaxScreenRect(
VIEW_LOGICAL_MAX_LEFT,
VIEW_LOGICAL_MAX_RIGHT,
VIEW_LOGICAL_MAX_BOTTOM,
VIEW_LOGICAL_MAX_TOP
);

}

void Live2dSprite::draw(cocos2d::Renderer *renderer, const cocos2d::Mat4 &transform, uint32_t flags)
{
DrawNode::draw(renderer, transform, flags);

_customCommand.init(_globalZOrder);
_customCommand.func = CC_CALLBACK_0(Live2dSprite::onDraw, this, transform, flags);
renderer->addCommand(&_customCommand);
}


void Live2dSprite::onDraw(const cocos2d::Mat4 &transform, uint32_t flags)
{
this->updatePosition(ccpAdd( getParent()->getPosition(), getPosition()));
kmGLPushMatrix();
kmGLLoadMatrix(&transform);

if(_isRenderShadow)
{
int size = l2d_model->getModelSetting()->getTextureNum();
auto model = ((Live2DModelOpenGL*)l2d_model->getLive2DModel());
for(int i = 0;isetTextureColor(i, 0.0, 0.0, 0.0, 0);
}
}

// colors
glEnableVertexAttribArray(GLProgram::VERTEX_ATTRIB_COLOR);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(V2F_C4B_T2F), (GLvoid *)offsetof(V2F_C4B_T2F, colors));
modelUpdate();

if(_isRenderShadow)
{
int size = l2d_model->getModelSetting()->getTextureNum();
auto model = ((Live2DModelOpenGL*)l2d_model->getLive2DModel());
for(int i = 0;isetTextureColor(i, _shadow, _shadow, _shadow, 0);
}
}

kmGLPopMatrix();
glFrontFace(GL_CCW);
}


void Live2dSprite::modelUpdate()
{
live2d::DrawProfileCocos2D::preDraw();

L2DMatrix44 projection;

Director* director=Director::getInstance();
Size window=director->getWinSize();

projection.scale(1, window.width/window.height);
//float scale = model_width/window.width;
//projection.scale(scale, window.width/window.height * scale);
if (viewMatrix != NULL) {
projection.append(viewMatrix);
}


if(l2d_model != NULL)
{
l2d_model->update();
l2d_model->draw(projection);
}

live2d::DrawProfileCocos2D::postDraw();
}

naotaro

Are you using the setBaseColor to the texture color change ?

Live2D API Reference - DrawParam->setBaseColor()

What is isetTextureColor?
I think that perhaps _shadow becomes 0.0 .

isetTextureColor(i, _shadow, _shadow, _shadow, 0)

I think it is draw correctly if you use the following .

DrawParam->setBaseColor(1.0, 1.0, 1.0, 1.0)

Yongjxu

I have removed the code setTextureColor. And it still happens.
void Live2dSprite::setShadowOnModel(float shadow)
{
if(shadow>1.0 || shadow<0.0)
{
shadow = 1.0;
}
_shadow = shadow;
/*
if(l2d_model)
{
int size = l2d_model->getModelSetting()->getTextureNum();
auto model = ((Live2DModelOpenGL*)l2d_model->getLive2DModel());
for(int i = 0;isetTextureColor(i, _shadow, _shadow, _shadow, 0);
}
}
*/
}

void Live2dSprite::onDraw(const cocos2d::Mat4 &transform, uint32_t flags)
{
this->updatePosition(ccpAdd( getParent()->getPosition(), getPosition()));
kmGLPushMatrix();
kmGLLoadMatrix(&transform);
/*
if(_isRenderShadow)
{
int size = l2d_model->getModelSetting()->getTextureNum();
auto model = ((Live2DModelOpenGL*)l2d_model->getLive2DModel());
for(int i = 0;isetTextureColor(i, 0.0, 0.0, 0.0, 0);
}
}
*/
// colors
glEnableVertexAttribArray(GLProgram::VERTEX_ATTRIB_COLOR);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(V2F_C4B_T2F), (GLvoid *)offsetof(V2F_C4B_T2F, colors));
modelUpdate();
/*
if(_isRenderShadow)
{
int size = l2d_model->getModelSetting()->getTextureNum();
auto model = ((Live2DModelOpenGL*)l2d_model->getLive2DModel());
for(int i = 0;isetTextureColor(i, _shadow, _shadow, _shadow, 0);
}
}
*/
kmGLPopMatrix();
glFrontFace(GL_CCW);
}

naotaro

So I said, use the following API !

DrawParam->setBaseColor(1.0, 1.0, 1.0, 1.0)

Yongjxu

I have using the API you said, the bugs still shows after I load and release the live2d model for dozens of times.
As you can see, left image the bug shows and right image shows when I set the texture color to black.

Code:

void Live2dSprite::onDraw(const cocos2d::Mat4 &transform, uint32_t flags)
{
this->updatePosition(ccpAdd( getParent()->getPosition(), getPosition()));
kmGLPushMatrix();
kmGLLoadMatrix(&transform);

l2d_model->getLive2DModel()->getDrawParam()->setBaseColor(1.0, 1.0, 1.0, 1.0);

// colors
glEnableVertexAttribArray(GLProgram::VERTEX_ATTRIB_COLOR);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(V2F_C4B_T2F), (GLvoid *)offsetof(V2F_C4B_T2F, colors));
modelUpdate();
kmGLPopMatrix();
glFrontFace(GL_CCW);
}

naotaro

I See . Please ignore the contents of which I have commented in the past .
In code that you have posted the first time in this discussion , What happens if you have modified as follows ?

isetTextureColor(i, _shadow, _shadow, _shadow, 0);

　　　　　　　　　　　　↓

isetTextureColor(i, 1.0, 1.0, 1.0, 0);

In the case of Simple project of cocos2d-X Live2D SDK, I was able to change the texture color in setBaseColor().

[SampleLive2DSprite.cpp]

void SampleLive2DSprite::onDraw(const cocos2d::Mat4 &transform, uint32_t flags)
{
	kmGLPushMatrix();
    kmGLLoadMatrix(&transform);
	 
	double t = (UtSystem::getUserTimeMSec()/1000.0) * 2 * M_PI;
	double cycle=3.0;
	double value=sin( t/cycle );
	live2DModel->setParamFloat( "PARAM_ANGLE_X" , (float) (30 * value) ) ;
	live2d::DrawProfileCocos2D::preDraw();    
    // << add Code >> Texture Color = Black
    // live2DModel->getDrawParam()->setBaseColor(1.0, 0.0, 0.0, 0.0);
    // << add Code >> Texture Color = Default
   live2DModel->getDrawParam()->setBaseColor(1.0, 1.0, 1.0, 1.0);
    
	live2DModel->update() ;
	live2DModel->draw() ;
	
	live2d::DrawProfileCocos2D::postDraw() ;
	kmGLPopMatrix();
}

In your program , I think that it probably has been changed texture color in isetTextureColor .
In a program that has been posted on here , I don't know detailed processing of isetTextureColor.
Probably you don't have the same process as setBaseColor?

Or it might be a problem of the model .
How do you Test in Live2D of sample models ?

Live2D Manual - Live2D Sample Model

And I'm sorry if the cause is completely different .
I know it is only this . thanks !

Yongjxu

Thanks for your support. I have found the root cause for the problem.

I have made the flowing change in file LAppTextureDesc.cpp.

LAppTextureDesc::LAppTextureDesc(cocos2d::Texture2D* tex,std::string fileName)
{
data=tex;
tex->retain();
textureFileName=fileName;
}

LAppTextureDesc::~LAppTextureDesc()
{
data->release();
if(data->getReferenceCount() == 1)
Director::getInstance()->getTextureCache()->removeTextureForKey(textureFileName);

}