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Fix support for vertically flipped tiles

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Turns out there was another renderer bug that would effectively
ignore the vertical flip if a Quad had an active ElementEffect that
used a grid (effects on numpad keys 1,2,3,5,6).
This commit is contained in:
fgenesis 2023-07-18 18:57:54 +02:00
parent 1da28ec40a
commit 3ac706f1b6
4 changed files with 45 additions and 16 deletions
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50
BBGE/TileRender.cpp
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@ -121,18 +121,6 @@ void TileRender::onRender(const RenderState& rs) const
glBindTexture(GL_TEXTURE_2D, 0); // unlikely
}
glPushMatrix();
glTranslatef(pos.x, pos.y, pos.z);
glRotatef(tile.rotation, 0, 0, 1);
if(tile.flags & TILEFLAG_FH)
glRotatef(180, 0, 1, 0);
// this is only relevant in editor mode and is always 0 otherwise
//glTranslatef(tile.beforeScaleOffsetX, tile.beforeScaleOffsetY, 0);
glScalef(sw, sh, 1);
float alpha = rs.alpha;
const TileEffectData * const eff = tile.eff;
if(eff != prevEff) // effects between tiles are often shared so this works not only for NULL
@ -153,6 +141,44 @@ void TileRender::onRender(const RenderState& rs) const
glColor4f(rs.color.x, rs.color.y, rs.color.z, alpha);
}
glPushMatrix();
glTranslatef(pos.x, pos.y, pos.z);
// HACK: Due to a renderer bug in older versions, vertical flip is ignored
// when a grid-based tile effect is applied.
// Maps were designed with the bug present so we need to replicate it,
// otherwise things won't look correct.
unsigned effflag = tile.flags;
if(grid)
effflag &= ~TILEFLAG_FV;
float effrot = tile.rotation;
// both set? that's effectively a rotation by 180°
if ((effflag & (TILEFLAG_FH | TILEFLAG_FV)) == (TILEFLAG_FH | TILEFLAG_FV))
effrot += 180;
glRotatef(effrot, 0, 0, 1);
switch(effflag & (TILEFLAG_FH | TILEFLAG_FV))
{
case TILEFLAG_FH:
glRotatef(180, 0, 1, 0);
break;
case TILEFLAG_FV:
glRotatef(180, 1, 0, 0);
break;
default: ; // both or none set, nothing to do
}
// this is only relevant in editor mode and is always 0 otherwise
//glTranslatef(tile.beforeScaleOffsetX, tile.beforeScaleOffsetY, 0);
glScalef(sw, sh, 1);
if(!grid)
{
const float *tcbuf = (tile.flags & TILEFLAG_REPEAT)