WalkDownSlope()

static Vector4 Terraria.Collision.WalkDownSlope ( Vector2 Position, Vector2 Velocity, int Width, int Height, float gravity = 0f )

inlinestatic

Definition at line 1475 of file Collision.cs.

    {
        if (Velocity.Y != gravity)
        {
            return new Vector4(Position, Velocity.X, Velocity.Y);
        }
        Vector2 vector = Position;
        int value = (int)(vector.X / 16f);
        int value2 = (int)((vector.X + (float)Width) / 16f);
        int value3 = (int)((Position.Y + (float)Height + 4f) / 16f);
        value = Utils.Clamp(value, 0, Main.maxTilesX - 1);
        value2 = Utils.Clamp(value2, 0, Main.maxTilesX - 1);
        value3 = Utils.Clamp(value3, 0, Main.maxTilesY - 3);
        float num = (value3 + 3) * 16;
        int num2 = -1;
        int num3 = -1;
        int num4 = 1;
        if (Velocity.X < 0f)
        {
            num4 = 2;
        }
        for (int i = value; i <= value2; i++)
        {
            for (int j = value3; j <= value3 + 1; j++)
            {
                if (Main.tile[i, j] == null)
                {
                    Main.tile[i, j] = new Tile();
                }
                if (!Main.tile[i, j].nactive() || (!Main.tileSolid[Main.tile[i, j].type] && !Main.tileSolidTop[Main.tile[i, j].type]))
                {
                    continue;
                }
                int num5 = j * 16;
                if (Main.tile[i, j].halfBrick())
                {
                    num5 += 8;
                }
                if (!new Rectangle(i * 16, j * 16 - 17, 16, 16).Intersects(new Rectangle((int)Position.X, (int)Position.Y, Width, Height)) || !((float)num5 <= num))
                {
                    continue;
                }
                if (num == (float)num5)
                {
                    if (Main.tile[i, j].slope() == 0)
                    {
                        continue;
                    }
                    if (num2 != -1 && num3 != -1 && Main.tile[num2, num3] != null && Main.tile[num2, num3].slope() != 0)
                    {
                        if (Main.tile[i, j].slope() == num4)
                        {
                            num = num5;
                            num2 = i;
                            num3 = j;
                        }
                    }
                    else
                    {
                        num = num5;
                        num2 = i;
                        num3 = j;
                    }
                }
                else
                {
                    num = num5;
                    num2 = i;
                    num3 = j;
                }
            }
        }
        int num6 = num2;
        int num7 = num3;
        if (num2 != -1 && num3 != -1 && Main.tile[num6, num7] != null && Main.tile[num6, num7].slope() > 0)
        {
            int num8 = Main.tile[num6, num7].slope();
            Vector2 vector2 = default(Vector2);
            vector2.X = num6 * 16;
            vector2.Y = num7 * 16;
            switch (num8)
            {
            case 2:
            {
                float num9 = vector2.X + 16f - (Position.X + (float)Width);
                if (Position.Y + (float)Height >= vector2.Y + num9 && Velocity.X < 0f)
                {
                    Velocity.Y += Math.Abs(Velocity.X);
                }
                break;
            }
            case 1:
            {
                float num9 = Position.X - vector2.X;
                if (Position.Y + (float)Height >= vector2.Y + num9 && Velocity.X > 0f)
                {
                    Velocity.Y += Math.Abs(Velocity.X);
                }
                break;
            }
            }
        }
        return new Vector4(Position, Velocity.X, Velocity.Y);
    }

References System.Math.Abs(), Microsoft.Xna.Framework.Intersects, Terraria.Main.maxTilesX, Terraria.Main.maxTilesY, Terraria.DataStructures.Tile, Terraria.Main.tile, Terraria.Main.tileSolid, Terraria.Main.tileSolidTop, System.value, Microsoft.Xna.Framework.Vector2.X, and Microsoft.Xna.Framework.Vector2.Y.

Referenced by Terraria.NPC.Collision_WalkDownSlopes(), and Terraria.Player.SlopeDownMovement().