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Enabling OpenGL Multisampling for antialiasing

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brunoherbelin
2020-05-16 16:01:01 +02:00
parent 22a6dc63e9
commit 610e68c697
5 changed files with 34 additions and 20 deletions
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30
Mesh.cpp
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@@ -425,6 +425,9 @@ void Frame::draw(glm::mat4 modelview, glm::mat4 projection)
if(shadow_)
shadow_->draw( modelview * transform_, projection);
// enable antialiasing
glEnable(GL_MULTISAMPLE_ARB);
// right side
float ar = scale_.x / scale_.y;
glm::vec3 s(1.f, 1.f, 1.f);
@@ -440,9 +443,11 @@ void Frame::draw(glm::mat4 modelview, glm::mat4 projection)
t.x = -t.x;
s.x = -s.x;
ctm = modelview * GlmToolkit::transform(t, rotation_, s);
border_->draw( ctm, projection );
// border_->draw( ctm, projection );
}
// enable antialiasing
glDisable(GL_MULTISAMPLE_ARB);
}
}
@@ -476,6 +481,9 @@ void Handles::draw(glm::mat4 modelview, glm::mat4 projection)
}
if ( visible_ ) {
// enable antialiasing
glEnable(GL_MULTISAMPLE_ARB);
// set color
handle_->shader()->color = color;
@@ -485,47 +493,49 @@ void Handles::draw(glm::mat4 modelview, glm::mat4 projection)
if ( type_ == RESIZE ) {
// 4 corners
ctm = modelview * glm::translate(glm::identity<glm::mat4>(), glm::vec3(ar, -1.f, 0.f) );
ctm[0][0] = ctm[1][1] = ctm[2][2] = 1.f;
handle_->draw( ctm, projection );
ctm = modelview * glm::translate(glm::identity<glm::mat4>(), glm::vec3(ar, +1.f, 0.f));
ctm[0][0] = ctm[1][1] = ctm[2][2] = 1.f;
handle_->draw( ctm, projection );
ctm = modelview * glm::translate(glm::identity<glm::mat4>(), glm::vec3(-ar, -1.f, 0.f));
ctm[0][0] = ctm[1][1] = ctm[2][2] = 1.f;
handle_->draw( ctm, projection );
ctm = modelview * glm::translate(glm::identity<glm::mat4>(), glm::vec3(-ar, +1.f, 0.f));
ctm[0][0] = ctm[1][1] = ctm[2][2] = 1.f;
handle_->draw( ctm, projection );
}
else if ( type_ == RESIZE_H ){
// left and right
ctm = modelview * glm::translate(glm::identity<glm::mat4>(), glm::vec3(ar, 0.f, 0.f) );
ctm[0][0] = ctm[1][1] = ctm[2][2] = 1.f;
handle_->draw( ctm, projection );
ctm = modelview * glm::translate(glm::identity<glm::mat4>(), glm::vec3(-ar, 0.f, 0.f));
ctm[0][0] = ctm[1][1] = ctm[2][2] = 1.f;
handle_->draw( ctm, projection );
}
else if ( type_ == RESIZE_V ){
// top and bottom
ctm = modelview * glm::translate(glm::identity<glm::mat4>(), glm::vec3(0.f, +1.f, 0.f) );
ctm[0][0] = ctm[1][1] = ctm[2][2] = 1.f;
handle_->draw( ctm, projection );
ctm = modelview * glm::translate(glm::identity<glm::mat4>(), glm::vec3(0.f, -1.f, 0.f));
ctm[0][0] = ctm[1][1] = ctm[2][2] = 1.f;
handle_->draw( ctm, projection );
}
else if ( type_ == ROTATE ){
// only once in upper top right corner
ctm = modelview * glm::translate(glm::identity<glm::mat4>(), glm::vec3(ar + 0.06f, +1.06f, 0.f));
ctm[0][0] = ctm[1][1] = ctm[2][2] = 1.f;
handle_->draw( ctm, projection );
}
glDisable(GL_MULTISAMPLE_ARB);
}
}