Rotation was still stored as an integer and as a fixed point number.
Compute the integer on demand from the fixed point instead, like the
position. Rewrite the movement code where the two variables were
temporarily out of sync.
This changes a global variable to an instance variable in order to make
the CPNGFile class usable from multiple threads, as long as each thread
uses its own instance of the class.
This might make the rendering a bit quicker, since the whole texture
environment setup that we do every frame is no longer required --
instead only the shader is bound and a few variables uploaded. However,
this was not the main motivation behind this change.
It also simplifies the code a bit. The texture environment setup is
replaced by GLSL code generation. Another small benefit is that for
texture units in material scripts that do not use an actual texture
image no hardware TIU is being used. This reduces the number of hardware
TIUs required for rendering the Clonk from 3 to 2.
The main benefit of this change, however, is that material specific
and clonk specific color variations can be applied correctly. This mainly
concerns ClrModulation and MOD2 drawing. Before, the ClrModulation was
mixed with the material color, which could lead to incorrect results
depending on what the texture units were doing. Now it is being applied
by the shader after all texture units in the material scripts have been
processed.
Another motivation of this change is to implement support for custom
shaders, which is already foreseen by OGRE material scripts. The
specification has only to be implemented. With this change in place,
both custom shaders and "fixed" processing can share the same code in
the engine, since both end up using a shader for the mesh rendering.
The shader currently works only for directional lights, but should be
easy to extend to also support point lights.
This mostly simplifies things, since most other places use an 32 bit
integer to store colors, but might even improve performance through better
cache locality.
This fixes the lightbulb symbol from floundering around back and forth when
zoomed in and scrolling. Since C4Facets can be used to specify a target area
to draw into (such as in C4DefGraphics::Draw), and since this area can be
zoomed, sub-pixel precision can be achieved this way in such drawing
operations.
Nicolas Hake