func Draw() {
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.PushMatrix()
defer gl.PopMatrix()
gl.Color4f(0, 1, 0, .5)
DrawCircle(vect.Vect{ScreenSize.X / 2, ScreenSize.Y / 2}, ScreenSize.Y/2.0-5.0, false)
if Settings.Paused {
gl.Color3f(1, 1, 1)
RenderFontAt("Paused", 20, 30)
}
//draw collision objects
gl.PushMatrix()
gl.Translated(ScreenSize.X/2, ScreenSize.Y/2, 0)
gl.Scaled(Settings.Scale, Settings.Scale, 1)
DrawDebugData(space)
gl.PopMatrix()
}
func DrawDebugData(space *collision.Space) {
//Draw shapes
for _, b := range space.Bodies {
if b.Enabled == false {
//Inactive
gl.Color3f(.5, .8, .5)
} else if b.IsStatic() {
//Static
gl.Color3f(1, 1, 1)
} else {
//Normal
gl.Color3f(1, 0, 0)
}
for _, s := range b.Shapes {
DrawShape(s)
}
}
gl.Color3f(0, 1, 0.5)
for _, b := range space.Bodies {
DrawTransform(&b.Transform, 0.2)
}
if Settings.DrawAABBs {
for _, b := range space.Bodies {
gl.Color3f(.3, .7, .7)
for _, s := range b.Shapes {
DrawQuad(s.AABB.Lower, s.AABB.Upper, false)
}
}
}
const contactRadius = 0.2
const contactNormalScale = 0.5
for arb := space.ContactManager.ArbiterList.Arbiter; arb != nil; arb = arb.Next {
for i := 0; i < arb.NumContacts; i++ {
con := arb.Contacts[i]
gl.Color3f(0, 0, 1)
p1 := con.Position
p2 := vect.Add(p1, vect.Mult(con.Normal, contactNormalScale))
//p2 := vect.Add(p1, vect.Mult(con.Normal, con.Separation))
DrawLine(p1, p2)
gl.Color3f(0, 1, 0)
DrawCircle(con.Position, contactRadius, false)
}
}
if Settings.DrawTreeNodes {
for _, node := range space.GetDynamicTreeNodes() {
gl.Color3f(0.0, .7, .7)
DrawQuad(node.AABB().Lower, node.AABB().Upper, false)
}
}
}