diff options
Diffstat (limited to 'engines/zvision/render_manager.cpp')
| -rw-r--r-- | engines/zvision/render_manager.cpp | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/engines/zvision/render_manager.cpp b/engines/zvision/render_manager.cpp index 6d3f7c6fc1..2a8ed1274e 100644 --- a/engines/zvision/render_manager.cpp +++ b/engines/zvision/render_manager.cpp @@ -24,6 +24,7 @@ #include "common/file.h" #include "common/system.h" +#include "common/rect.h" #include "graphics/decoders/tga.h" @@ -32,7 +33,12 @@ namespace ZVision { -RenderManager::RenderManager(OSystem *system) : _system(system) {} +RenderManager::RenderManager(OSystem *system, const int width, const int height) + : _system(system), + _width(width), + _height(height), + _renderTable(width, height) { +} void RenderManager::renderImageToScreen(const Common::String &fileName, uint32 x, uint32 y) { Common::File file; @@ -80,4 +86,40 @@ void RenderManager::renderImageToScreen(const Common::String &fileName, uint32 x _needsScreenUpdate = true; } +void RenderManager::generatePanoramaLookupTable() { + float fieldOfView = _panoramaOptions.fieldOfView; + float scale = _panoramaOptions.linearScale; + _renderTable.clear(); + + double halfWidth = (double)_width / 2.0; + double halfHeight = (double)_height / 2.0; + + double fovRadians = (fieldOfView * 3.14159265 / 180.0); + double halfHeightOverTan = halfHeight / tan(fovRadians); + double tanOverHalfHeight = tan(fovRadians) / halfHeight; + + for (int32 x = 0; x < _width; x++) { + // Add an offset of 0.01 to overcome zero tan/atan issue (vertical line on half of screen) + double xPos = (double)x - halfWidth + 0.01; + + double tempX = atan(xPos*tanOverHalfHeight); + double scaledX = scale * halfHeightOverTan * tempX; + double nn = cos(tempX); + double newHalfWidth = halfHeight * nn * halfHeightOverTan * tanOverHalfHeight*2.0; + + int32 newX = floor(scaledX);// + half_w); + + double yScale = newHalfWidth / (double)_height; + double et2 = ((double)_height - newHalfWidth) / 2.0; + + for (int32 y = 0; y < _height; y++) { + double et1 = (double)y*yScale; + + _renderTable(x, y).x = newX; //pixel index + + int32 newY = floor(et2 + et1); + _renderTable(x, y).y = newY; //pixel index + } + } +} } // End of namespace ZVision |