StepUp()

static void Terraria.Collision.StepUp ( ref Vector2 position, ref Vector2 velocity, int width, int height, ref float stepSpeed, ref float gfxOffY, int gravDir = 1, bool holdsMatching = false, int specialChecksMode = 0 )

inlinestatic

Definition at line 3101 of file Collision.cs.

    {
        int num = 0;
        if (velocity.X < 0f)
        {
            num = -1;
        }
        if (velocity.X > 0f)
        {
            num = 1;
        }
        Vector2 vector = position;
        vector.X += velocity.X;
        int num2 = (int)((vector.X + (float)(width / 2) + (float)((width / 2 + 1) * num)) / 16f);
        int num3 = (int)(((double)vector.Y + 0.1) / 16.0);
        if (gravDir == 1)
        {
            num3 = (int)((vector.Y + (float)height - 1f) / 16f);
        }
        int num4 = height / 16 + ((height % 16 != 0) ? 1 : 0);
        bool flag = true;
        bool flag2 = true;
        if (Main.tile[num2, num3] == null)
        {
            return;
        }
        for (int i = 1; i < num4 + 2; i++)
        {
            if (!WorldGen.InWorld(num2, num3 - i * gravDir) || Main.tile[num2, num3 - i * gravDir] == null)
            {
                return;
            }
        }
        if (!WorldGen.InWorld(num2 - num, num3 - num4 * gravDir) || Main.tile[num2 - num, num3 - num4 * gravDir] == null)
        {
            return;
        }
        Tile tile;
        for (int j = 2; j < num4 + 1; j++)
        {
            if (!WorldGen.InWorld(num2, num3 - j * gravDir) || Main.tile[num2, num3 - j * gravDir] == null)
            {
                return;
            }
            tile = Main.tile[num2, num3 - j * gravDir];
            flag = flag && (!tile.nactive() || !Main.tileSolid[tile.type] || Main.tileSolidTop[tile.type]);
        }
        tile = Main.tile[num2 - num, num3 - num4 * gravDir];
        flag2 = flag2 && (!tile.nactive() || !Main.tileSolid[tile.type] || Main.tileSolidTop[tile.type]);
        bool flag3 = true;
        bool flag4 = true;
        bool flag5 = true;
        Tile tile2;
        if (gravDir == 1)
        {
            if (Main.tile[num2, num3 - gravDir] == null || Main.tile[num2, num3 - (num4 + 1) * gravDir] == null)
            {
                return;
            }
            tile = Main.tile[num2, num3 - gravDir];
            tile2 = Main.tile[num2, num3 - (num4 + 1) * gravDir];
            flag3 = flag3 && (!tile.nactive() || !Main.tileSolid[tile.type] || Main.tileSolidTop[tile.type] || (tile.slope() == 1 && position.X + (float)(width / 2) > (float)(num2 * 16)) || (tile.slope() == 2 && position.X + (float)(width / 2) < (float)(num2 * 16 + 16)) || (tile.halfBrick() && (!tile2.nactive() || !Main.tileSolid[tile2.type] || Main.tileSolidTop[tile2.type])));
            tile = Main.tile[num2, num3];
            tile2 = Main.tile[num2, num3 - 1];
            if (specialChecksMode == 1)
            {
                flag5 = tile.type != 16 && tile.type != 18 && tile.type != 14 && tile.type != 469 && tile.type != 134;
            }
            flag4 = flag4 && ((tile.nactive() && (!tile.topSlope() || (tile.slope() == 1 && position.X + (float)(width / 2) < (float)(num2 * 16)) || (tile.slope() == 2 && position.X + (float)(width / 2) > (float)(num2 * 16 + 16))) && (!tile.topSlope() || position.Y + (float)height > (float)(num3 * 16)) && ((Main.tileSolid[tile.type] && !Main.tileSolidTop[tile.type]) || (holdsMatching && ((Main.tileSolidTop[tile.type] && tile.frameY == 0) || TileID.Sets.Platforms[tile.type]) && (!Main.tileSolid[tile2.type] || !tile2.nactive()) && flag5))) || (tile2.halfBrick() && tile2.nactive()));
            flag4 &= !Main.tileSolidTop[tile.type] || !Main.tileSolidTop[tile2.type];
        }
        else
        {
            tile = Main.tile[num2, num3 - gravDir];
            tile2 = Main.tile[num2, num3 - (num4 + 1) * gravDir];
            flag3 = flag3 && (!tile.nactive() || !Main.tileSolid[tile.type] || Main.tileSolidTop[tile.type] || tile.slope() != 0 || (tile.halfBrick() && (!tile2.nactive() || !Main.tileSolid[tile2.type] || Main.tileSolidTop[tile2.type])));
            tile = Main.tile[num2, num3];
            tile2 = Main.tile[num2, num3 + 1];
            flag4 = flag4 && ((tile.nactive() && ((Main.tileSolid[tile.type] && !Main.tileSolidTop[tile.type]) || (holdsMatching && Main.tileSolidTop[tile.type] && tile.frameY == 0 && (!Main.tileSolid[tile2.type] || !tile2.nactive())))) || (tile2.halfBrick() && tile2.nactive()));
        }
        if (!((float)(num2 * 16) < vector.X + (float)width) || !((float)(num2 * 16 + 16) > vector.X))
        {
            return;
        }
        if (gravDir == 1)
        {
            if (!(flag4 && flag3 && flag && flag2))
            {
                return;
            }
            float num5 = num3 * 16;
            if (Main.tile[num2, num3 - 1].halfBrick())
            {
                num5 -= 8f;
            }
            else if (Main.tile[num2, num3].halfBrick())
            {
                num5 += 8f;
            }
            if (!(num5 < vector.Y + (float)height))
            {
                return;
            }
            float num6 = vector.Y + (float)height - num5;
            if ((double)num6 <= 16.1)
            {
                gfxOffY += position.Y + (float)height - num5;
                position.Y = num5 - (float)height;
                if (num6 < 9f)
                {
                    stepSpeed = 1f;
                }
                else
                {
                    stepSpeed = 2f;
                }
            }
        }
        else
        {
            if (!(flag4 && flag3 && flag && flag2) || Main.tile[num2, num3].bottomSlope() || TileID.Sets.Platforms[tile2.type])
            {
                return;
            }
            float num7 = num3 * 16 + 16;
            if (!(num7 > vector.Y))
            {
                return;
            }
            float num8 = num7 - vector.Y;
            if ((double)num8 <= 16.1)
            {
                gfxOffY -= num7 - position.Y;
                position.Y = num7;
                velocity.Y = 0f;
                if (num8 < 9f)
                {
                    stepSpeed = 1f;
                }
                else
                {
                    stepSpeed = 2f;
                }
            }
        }
    }

References Terraria.Tile.halfBrick(), Terraria.WorldGen.InWorld(), Terraria.Tile.nactive(), Terraria.ID.TileID.Sets.Platforms, Terraria.Tile.slope(), Terraria.Main.tile, Terraria.Main.tileSolid, Terraria.Main.tileSolidTop, and Terraria.Tile.type.

Referenced by Terraria.NPC.AI_007_TownEntities(), Terraria.Projectile.AI_026(), Terraria.Projectile.AI_067_FreakingPirates(), Terraria.NPC.AI_107_ImprovedWalkers(), Terraria.Player.DryCollision(), and Terraria.Player.Update().