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model2.cpp: fix Zero Gunner background priorities [Olivier Galibert]

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This commit is contained in:
angelosa 2018-03-11 15:21:37 +01:00
parent f967a0359c
commit 84ddd49de7
1 changed files with 5 additions and 5 deletions
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10
src/mame/video/model2.cpp
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@ -485,7 +485,7 @@ void model2_state::model2_3d_process_quad( raster_state *raster, uint32_t attr )
break;
case 3: // error
default:
zvalue = 0.0f;
zvalue = 1e10;
break;
}
@ -704,7 +704,7 @@ void model2_state::model2_3d_process_triangle( raster_state *raster, uint32_t at
break;
case 3: // error
default:
zvalue = 0.0f;
zvalue = 1e10;
break;
}
@ -841,8 +841,6 @@ void model2_renderer::model2_3d_render(triangle *tri, const rectangle &cliprect)
/* calculate and clip to viewport */
rectangle vp(tri->viewport[0] + m_xoffs, tri->viewport[2] + m_xoffs, (384-tri->viewport[3]) + m_yoffs, (384-tri->viewport[1]) + m_yoffs);
// TODO: this seems to be more accurate but it breaks in some cases
//rectangle vp(tri->viewport[0] - 8, tri->viewport[2] - tri->viewport[0], tri->viewport[1] - 90, tri->viewport[3] - tri->viewport[1]);
vp &= cliprect;
extra.state = &m_state;
@ -1181,7 +1179,9 @@ void model2_state::model2_3d_push( raster_state *raster, uint32_t input )
raster->center_sel = ( input >> 6 ) & 3;
/* reset the triangle z value */
raster->triangle_z = 0.0f;
// Zero Gunner sets backgrounds with "previous z value" mode at the start of the display list,
// needs this to be this big in order to work properly
raster->triangle_z = 1e10;
}
}
}