func (rv *RoomViewer) Drag(dx, dy float64) {
v := mathgl.Vec3{X: rv.fx, Y: rv.fy}
vx := mathgl.Vec3{1, -1, 0}
vx.Normalize()
vy := mathgl.Vec3{1, 1, 0}
vy.Normalize()
vx.Scale(float32(dx) / rv.zoom * 2)
vy.Scale(float32(dy) / rv.zoom * 2)
v.Add(&vx)
v.Add(&vy)
rv.fx, rv.fy = v.X, v.Y
rv.makeMat()
}
// Distance to Plane(Point?)? WTF IS THIS!?
func d2p(tmat mathgl.Mat4, point, ray mathgl.Vec3) float32 {
var mat mathgl.Mat4
mat.Assign(&tmat)
var sub mathgl.Vec3
sub.X = mat[12]
sub.Y = mat[13]
sub.Z = mat[14]
mat[12], mat[13], mat[14] = 0, 0, 0
point.Subtract(&sub)
point.Scale(-1)
ray.Normalize()
dist := point.Dot(mat.GetForwardVec3())
var forward mathgl.Vec3
forward.Assign(mat.GetForwardVec3())
cos := float64(forward.Dot(&ray))
return dist / float32(cos)
}
func (hv *HouseViewer) Drag(dx, dy float64) {
v := mathgl.Vec3{X: hv.fx, Y: hv.fy}
vx := mathgl.Vec3{1, -1, 0}
vx.Normalize()
vy := mathgl.Vec3{1, 1, 0}
vy.Normalize()
vx.Scale(float32(dx) / hv.zoom * 2)
vy.Scale(float32(dy) / hv.zoom * 2)
v.Add(&vx)
v.Add(&vy)
if hv.bounds.on {
hv.fx = clamp(v.X, hv.bounds.min.x, hv.bounds.max.x)
hv.fy = clamp(v.Y, hv.bounds.min.y, hv.bounds.max.y)
} else {
hv.fx, hv.fy = v.X, v.Y
}
hv.target_on = false
}