49 lines
1.9 KiB
C++
49 lines
1.9 KiB
C++
// This code is in the public domain -- castanyo@yahoo.es
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#pragma once
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#ifndef NV_MESH_RASTER_H
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#define NV_MESH_RASTER_H
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/** @file Raster.h
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* @brief Rasterization library.
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*
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* This is just a standard scanline rasterizer that I took from one of my old
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* projects. The perspective correction wasn't necessary so I just removed it.
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**/
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#include "nvmath/Vector.h"
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#include "nvmesh/nvmesh.h"
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namespace nv
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{
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namespace Raster
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{
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enum Mode {
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Mode_Nearest,
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Mode_Antialiased,
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//Mode_Conservative
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};
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/// A callback to sample the environment. Return false to terminate rasterization.
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typedef bool (NV_CDECL * SamplingCallback)(void * param, int x, int y, Vector3::Arg bar, Vector3::Arg dx, Vector3::Arg dy, float coverage);
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// Process the given triangle. Returns false if rasterization was interrupted by the callback.
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NVMESH_API bool drawTriangle(Mode mode, Vector2::Arg extents, bool enableScissors, const Vector2 v[3], SamplingCallback cb, void * param);
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// Process the given quad. Returns false if rasterization was interrupted by the callback.
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NVMESH_API bool drawQuad(Mode mode, Vector2::Arg extents, bool enableScissors, const Vector2 v[4], SamplingCallback cb, void * param);
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typedef bool (NV_CDECL * LineSamplingCallback)(void * param, int x, int y, float t, float d); // t is the position along the segment, d is the distance to the line.
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// Process the given line.
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NVMESH_API void drawLine(bool antialias, Vector2::Arg extents, bool enableScissors, const Vector2 v[2], LineSamplingCallback cb, void * param);
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// Draw vertical or horizontal segments. For degenerate triangles.
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//NVMESH_API void drawSegment(Vector2::Arg extents, bool enableScissors, const Vector2 v[2], SamplingCallback cb, void * param);
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}
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}
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#endif // NV_MESH_RASTER_H
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