f2cc840c31
add crude screenshot facility (using F1 key), it can also be used for debugging start with shadows using shadowmap, not working yet add experimental 'ignore' body index in raycast, using b3HitInfo.m_m_hitResult2
109 lines
2.0 KiB
C++
109 lines
2.0 KiB
C++
|
|
///See http://www.opengl-tutorial.org/intermediate-tutorials/tutorial-14-render-to-texture/
|
|
|
|
#include "GLRenderToTexture.h"
|
|
#include "Bullet3Common/b3Scalar.h" // for b3Assert
|
|
GLRenderToTexture::GLRenderToTexture()
|
|
:m_framebufferName(0)
|
|
{
|
|
}
|
|
|
|
void GLRenderToTexture::init(int width, int height, GLuint textureId, int renderTextureType)
|
|
{
|
|
m_renderTextureType = renderTextureType;
|
|
|
|
glGenFramebuffers(1, &m_framebufferName);
|
|
glBindFramebuffer(GL_FRAMEBUFFER, m_framebufferName);
|
|
|
|
switch (m_renderTextureType)
|
|
{
|
|
case RENDERTEXTURE_COLOR:
|
|
{
|
|
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, textureId, 0);
|
|
break;
|
|
}
|
|
case RENDERTEXTURE_DEPTH:
|
|
{
|
|
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, textureId, 0);
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
b3Assert(0);
|
|
}
|
|
};
|
|
|
|
|
|
// The depth buffer
|
|
glGenRenderbuffers(1, &m_depthrenderbuffer);
|
|
|
|
glBindRenderbuffer(GL_RENDERBUFFER, m_depthrenderbuffer);
|
|
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height);
|
|
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, m_depthrenderbuffer);
|
|
|
|
glBindFramebuffer( GL_FRAMEBUFFER, 0 );
|
|
|
|
|
|
}
|
|
|
|
bool GLRenderToTexture::enable()
|
|
{
|
|
bool status = false;
|
|
|
|
glBindFramebuffer(GL_FRAMEBUFFER, m_framebufferName);
|
|
|
|
|
|
switch (m_renderTextureType)
|
|
{
|
|
case RENDERTEXTURE_COLOR:
|
|
{
|
|
// Set the list of draw buffers.
|
|
GLenum drawBuffers[2] = {GL_COLOR_ATTACHMENT0,0};
|
|
glDrawBuffers(1, drawBuffers);
|
|
break;
|
|
}
|
|
case RENDERTEXTURE_DEPTH:
|
|
{
|
|
glDrawBuffer(GL_NONE);
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
b3Assert(0);
|
|
}
|
|
};
|
|
|
|
|
|
// Always check that our framebuffer is ok
|
|
if(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE)
|
|
{
|
|
status = true;
|
|
}
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
void GLRenderToTexture::disable()
|
|
{
|
|
glBindFramebuffer( GL_FRAMEBUFFER, 0 );
|
|
}
|
|
|
|
GLRenderToTexture::~GLRenderToTexture()
|
|
{
|
|
glBindFramebuffer( GL_FRAMEBUFFER, 0 );
|
|
|
|
if (m_depthrenderbuffer)
|
|
{
|
|
glDeleteRenderbuffers(1,&m_depthrenderbuffer);
|
|
}
|
|
|
|
|
|
if( m_framebufferName)
|
|
{
|
|
glDeleteFramebuffers(1, &m_framebufferName);
|
|
}
|
|
}
|
|
|