Function Matrix4_Frustum

engine/script/src/script_vmath.cpp:1466–1481

creates a frustum matrix * * Constructs a frustum matrix from the given values. The left, right, * top and bottom coordinates of the view cone are expressed as distances * from the center of the near clipping plane. The near and far coordinates * are expressed as distances from the tip of the view frustum cone. * * @name vmath.matrix4_frustum * @param left [

     * ```
     */
    static int Matrix4_Frustum(lua_State* L)
    {
        float left = (float) luaL_checknumber(L, 1);
        float right = (float) luaL_checknumber(L, 2);
        float bottom = (float) luaL_checknumber(L, 3);
        float top = (float) luaL_checknumber(L, 4);
        float near_z = (float) luaL_checknumber(L, 5);
        if(near_z == 0.0f)
        {
            luaL_where(L, 1);
            dmLogWarning("%sperspective projection invalid, znear = 0", lua_tostring(L,-1));
        }
        float far_z = (float) luaL_checknumber(L, 6);
        PushMatrix4(L, Matrix4::frustum(left, right, bottom, top, near_z, far_z));
        return 1;
    }

    /*# creates a look-at view matrix
     *