The draw order of particles is now Y - 16 pixels.

This means that the order point of the sprites relative to the
particles is no longer the lowest point of the image but
instead a point which is approximately between the feet of
the characters.

The intent of the latest commits to treat sprites as perpendicular to the
ground instead of perpendicular to the view line is retained by this
approach.

I tested this with various particle effects and it results in exactly the
expected behavior. Note that this does NOT fix the current problems on TMW
with the snail slime effect, because the TMW content team accidently placed
this one 10px in the air. Sorry, garbage in, garbage out.

getDrawPixelY was re-renamed to getPixelY to be consistent with getPixelX,
while getPixelY was renamed to getDrawOrder, to make its purpose clear.

Further, particles are no longer drawn when behind other objects. This
is implemented by adding a drawnWhenBehind member function to Actor,
which currently returns true for everything except particles and compound-
sprites with more than one sub-sprites (the later case is consistent with
the previous behavior of them).

An exception are text particles which are excempt from this exception and
whose drawing order is also biased by 16 pixels south instead of north
to make them more visible.

Plus some minor changes from Bertram.

Reviewed-by: Bertram.

Resolves: Mana-Mantis #362.

1 files changed, 7 insertions, 2 deletions

diff --git a/src/particle.h b/src/particle.h
index a09648ee..7ba80a3c 100644
--- a/src/particle.h
+++ b/src/particle.h
@@ -95,8 +95,13 @@ class Particle : public Actor
         /**
          * Necessary for sorting with the other sprites.
          */
-        virtual int getDrawPixelY() const
-        { return (int) (mPos.y + mPos.z) - 64; }
+        virtual int getDrawOrder() const;
+
+        /**
+         * Do not draw particles when beind other objects
+         */
+        virtual bool drawnWhenBehind() const
+        { return false; }
 
         /**
          * Creates a blank particle as a child of the current particle