Another question: how to fill the empty space around text ?
void View3dWidget::renderText3D(string s, Vector3 xyz , Color3 c)
{
Float _scale=0.04f;
Text::Renderer3D render3d {*_fontText, _cacheText, 1.0f, Text::Alignment::MiddleCenter};
render3d.reserve(2,GL::BufferUsage::DynamicDraw,GL::BufferUsage::StaticDraw);
render3d.render(s);
Matrix4 scaleMatrix=Matrix4::scaling(Vector3(_scale,_scale*width()/height(),1.0));
Vector3 out = (camera().projectionMatrix()*cameraObject().absoluteTransformationMatrix().inverted()).transformPoint(xyz);
_shaderText.setTransformationProjectionMatrix(Matrix4::translation(out)*scaleMatrix)
.setColor(c)
.draw(render3d.mesh());
}
cylinder based on Primitive::capsule
don't scale it but pass the desired half-length to the function :)
I have two frame buffers. I have done this for test:
clearColor(0, Color4(index == 0 ? 1.0f : 0.0f, 1.0f, 0.0f, 0.25f))But only the green appears, which is the last one
@FoNz99089892_twitter what do you mean by "green is the last one"?
@mosra Do not work as can be seen
void View3dWidget::renderCylinder(vector3 v0, vector3 v1, Color3 c, float radius)
{
vector3 v=v1-v0;
GL::Mesh cylinder_ = MeshTools::compile(Primitives::capsule3DSolid(30,60,10,v.length()*0.5));
Matrix4 scaleMatrix=Matrix4::scaling(Vector3(radius,1.0,radius));
I try to dig up the problem later, because I know I'm giving you too little details. I try to export my framebuffers to a png. I should see transparent background.
I'll reach you later. In the meantime, if you have an advice, just say it.
@FoNz99089892_twitter to perform blending you have to use a shader, render a fullscreen triangle with the Flat shader for example
but yes, easiest in general is to build it from scratch, triangle by triangle
i'd leave it enabled for most of the drawing (it improves performance), but disable it when you render the labels that might get flipped
//render directly in paitGL()
void View3dWidget::renderText3D(QString s, Vector3 xyz , Color3 c)
{
Float _scale=0.04f;
Text::Renderer3D render3d {*_fontText, _cacheText, 1.0f, Text::Alignment::MiddleCenter};
render3d.reserve(6,GL::BufferUsage::DynamicDraw,GL::BufferUsage::StaticDraw);
render3d.render(s.toStdString());
Matrix4 scaleMatrix=Matrix4::scaling(Vector3(_scale,_scale*width()/height(),1.0));
Vector3 out = (camera().projectionMatrix()*cameraObject().absoluteTransformationMatrix().inverted()).transformPoint(xyz);
_shaderText.setTransformationProjectionMatrix(Matrix4::translation(out)*scaleMatrix)
.setColor(c)
.draw(render3d.mesh());
}
So， I doubt the projection matrix is not very good
Instead of creating the shader with the
VertexColor flag, you'd have to call setColor() on the shader instead.