physics.reflectRay()

physics.reflectRay()

សំរាប់ហ្វាំងសិននេះប្រើក្នុងការ reflect a vector ជាការត្រឡប់ដោយ physics.rayCast()

The reflected vector ត្រឡប់ជាតំណាង the direction of the reflection ហើយមាន magnitude (length) of 1

Syntax:

local reflected_ray_direction_x, reflected_ray_direction_y = physics.reflectRay( from_x, from_y, hits[1] )

from_x (required)

from_y (required)

hits[1] (required) An entry in the "hits" array, as returned by physics.rayCast().

សូមមើលកូដះ

local hits = physics.rayCast( from_x, from_y, to_x, to_y, "closest" )

if hits then

    -- There's at least one hit.

    print( "Hit count: " .. tostring( #hits ) )

    -- Output all the results.

    for i,v in ipairs(hits)

    do

        print( "Hit: ", i, object_name, " Position: ", v.position.x, v.position.y, " Surface normal: ", v.normal.x, v.normal.y)

    end

    print( "The first object hit is: ", hits[1].object, " at position: ", hits[1].position.x, hits[1].position.y, " where the surface normal is: ", hits[1].normal.x, hits[1].normal.y )

    local reflected_ray_direction_x, reflected_ray_direction_y = physics.reflectRay( from_x, from_y, hits[1] )

    print( "Reflected direction: ", reflected_ray_direction_x, " ", reflected_ray_direction_y )

else

    -- There's no hit.

end