diff options
author | Benoit Bolsee <benoit.bolsee@online.be> | 2009-04-26 16:23:30 +0400 |
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committer | Benoit Bolsee <benoit.bolsee@online.be> | 2009-04-26 16:23:30 +0400 |
commit | ba563216e9ec4e7c3e55ca343948d925a2dc1651 (patch) | |
tree | c982d2100e4625559d53ab1e9c8e2be04c4a1033 /source/gameengine/Rasterizer/RAS_FramingManager.cpp | |
parent | fc4ba5e13116835c3208ecfe21c9ccc3e93277f7 (diff) |
BGE: Fix Orthographic mode and viewport scaling
- the BGE now uses correct glOrtho projection whe camera is in orthographic mode
-
Diffstat (limited to 'source/gameengine/Rasterizer/RAS_FramingManager.cpp')
-rw-r--r-- | source/gameengine/Rasterizer/RAS_FramingManager.cpp | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/source/gameengine/Rasterizer/RAS_FramingManager.cpp b/source/gameengine/Rasterizer/RAS_FramingManager.cpp index e2bbca48bb5..ea18ffb2298 100644 --- a/source/gameengine/Rasterizer/RAS_FramingManager.cpp +++ b/source/gameengine/Rasterizer/RAS_FramingManager.cpp @@ -72,6 +72,39 @@ ComputeDefaultFrustum( void RAS_FramingManager:: +ComputeDefaultOrtho( + const float camnear, + const float camfar, + const float scale, + const float design_aspect_ratio, + RAS_FrameFrustum & frustum +) +{ + float halfSize = scale*0.5f; + float sizeX; + float sizeY; + + if (design_aspect_ratio > 1.f) { + // halfsize defines the width + sizeX = halfSize; + sizeY = halfSize/design_aspect_ratio; + } else { + // halfsize defines the height + sizeX = halfSize * design_aspect_ratio; + sizeY = halfSize; + } + + frustum.x2 = sizeX; + frustum.x1 = -frustum.x2; + frustum.y2 = sizeY; + frustum.y1 = -frustum.y2; + frustum.camnear = -camfar; + frustum.camfar = camfar; +} + + + void +RAS_FramingManager:: ComputeBestFitViewRect( const RAS_Rect &availableViewport, const float design_aspect_ratio, @@ -227,5 +260,73 @@ ComputeFrustum( } } + void +RAS_FramingManager:: + ComputeOrtho( + const RAS_FrameSettings &settings, + const RAS_Rect &availableViewport, + const RAS_Rect &viewport, + const float scale, + const float camnear, + const float camfar, + RAS_FrameFrustum &frustum + ) +{ + RAS_FrameSettings::RAS_FrameType type = settings.FrameType(); + + const float design_width = float(settings.DesignAspectWidth()); + const float design_height = float(settings.DesignAspectHeight()); + + float design_aspect_ratio = float(1); + + if (design_height == float(0)) { + // well this is ill defined + // lets just scale the thing + type = RAS_FrameSettings::e_frame_scale; + } else { + design_aspect_ratio = design_width/design_height; + } + + + ComputeDefaultOrtho( + camnear, + camfar, + scale, + design_aspect_ratio, + frustum + ); + + switch (type) { + + case RAS_FrameSettings::e_frame_extend: + { + RAS_Rect vt; + ComputeBestFitViewRect( + availableViewport, + design_aspect_ratio, + vt + ); + + // now scale the calculated frustum by the difference + // between vt and the viewport in each axis. + // These are always > 1 + + float x_scale = float(viewport.GetWidth())/float(vt.GetWidth()); + float y_scale = float(viewport.GetHeight())/float(vt.GetHeight()); + + frustum.x1 *= x_scale; + frustum.x2 *= x_scale; + frustum.y1 *= y_scale; + frustum.y2 *= y_scale; + + break; + } + case RAS_FrameSettings::e_frame_scale : + case RAS_FrameSettings::e_frame_bars: + default : + break; + } + +} |