Martin Sojka

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	4,029 reputation	bio	website		visits	member for	2 years, 9 months
1126 badges		location			seen	May 15 at 8:15

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Mar 13	comment	Is it possible to map mouse coordinates to isometric tiles with this coordinate system? @AndrewAustin I linked the derivation at the start of my answer, but here is the link again. What you do is to calculate the inverse matrix of the tile-space to screen-space transformation matrix. Check any basic geometry book which has a chapter about projections for details.
Feb 21	awarded	Nice Answer
Dec 8	awarded	Enlightened
Dec 7	awarded	Nice Answer
Dec 5	awarded	Nice Answer
Nov 16	answered	Boat passing under a bridge in a 2D tile based RTS
Nov 13	answered	How can I reflect a point with respect to the plane?
Nov 9	answered	If I project a sphere in 3D will it be a circle?
Nov 2	answered	How do I do random isometric paths?
Nov 2	revised	How do I do random isometric paths? Added the image
Oct 31	comment	Is there a multiplayer game engine where you can write the logic in any programming language? @georgek: Obviously it's been done before; IRC bots use exactly this method. Also obviously, there's nothing to learn from the concrete implementations as far as engine design goes. From the engine's point of view, those are just another set of (possibly specially privileged or restricted as far as some commands go, but you need this system anyway to distinguish between normal users, guests and admins at the very least) users.
Oct 30	answered	Is there a multiplayer game engine where you can write the logic in any programming language?
Oct 29	revised	Custom Music in Skyrim's Creation Kit? Tagging with skyrim
Oct 29	revised	Skyrim Creation Kit with Xbox 360 Tag changes: -programming (has nothing to do with that), +skyrim
Oct 29	comment	Why do we move the world instead of the camera? Though while the camera doesn't exist as such, you can still calculate its position before the transformation. In some cases however (non-axis-aligned parallel projection) you'll end up with more than one of the usual coordinates "at infinity" (positive or negative), which is less useful than the transformation matrix.
Oct 26	comment	*Characteristics, what's the inverse of (x(x+1))/2?** @derivative: Variables are in italics.
Oct 26	comment	Rotating multiple points at once in 2D @Deukalion \|\|v\|\| is the mathematical notation for "length of vector v". In other words, calculate (S-O) (a vector), sum the squares of its elements, then calculate the square root of the sum.
Oct 26	answered	*Characteristics, what's the inverse of (x(x+1))/2?**
Oct 26	comment	State changes in entities or components @GriffinHeart: I'd just implement whatever is needed to "build" the trap in the system associated with managing `BuildControllerComponent`s. It already needs to process player character's (or camera's) viewpoint changes and key and mouse press events.
Oct 26	comment	State changes in entities or components @Byte56: In general, you can query the associated components and its values. In practice, you often only need to know the relevant subset of the whole state, for example "Does this entity have `BuildControllerComponent`?" or "What is the position of this entity as recorded in its `PositionComponent`, if it has any?" - those you do by checking the component list for the ones you're interested in and optionally querying (some of) their values.