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irrlicht/source/Irrlicht/CTRTextureLightMap2_Add.cpp
engineer_apple 2340f9b849 Changes in 1.6 TA 
- PixelBlend16 and PixelBlend16_simd are working for the new rules.
	- bugfix. CLightSceneNode didn't correctly update it's attributes
	
		Lighting Linear Attenuation.	= 1.f / radius
		
		The Example loadirr files set the lightscene radius to 1000.f but
		stays on the previous default attentuation with the older radius 100 -> 1.f / 100
		so the examples looks golden-brown.
		
		Now the radius is correctly!! set to the attenuation of 1.f/1000.f because the
		file doesn't have special attenuation. and now it looks more yellow.
		can anybody show me a correct screenshot for this file;-)? Niko?
		
		Or is this behavior the default lighting?. then it would be
		a fixed constant linear attenuation of 0.01f;-). Please clearify
		For now i didn't fixed it
		
		
		I encountered this behavior because i ( burning video ) used the original radius
		for calculations and so i've found that radius != 1.f / linearAttenuation but
		in the LightSceneNode this formula was used.. confused;-)
		

	- vector template and equals tests
		as working with the test suits i cleaned the template behavior (mixed types are
		used in the templates) and added all missing special math function with their coressponding type
		I also set the equal test for s32 to behave like the f32 routine.

		The function equals always implements a weak test.		
		that means a tolerance MUST always be used if you use the equal function. default is 1.
		you can set it to zero a==b-> equals ( a, b, 0 ) but do it explicit like you have to
		for floating compare. This is important when irrlicht is going to use special hardware
		math acceleration on a per function base, like sse2, or the other way round fixpoint.
	
	- VideoDriver drawPixel
		The HW renderes are using the alpha components for blending.
		The Software Renderes and image loaders are using CImage::setPixel copy. 
		so setPixel is engaged to either blends or copy the pixel
		default: false
	- Burningvideo
		added RenderMaterial EMT_SPHERE_MAP
			pushed burningsvideo to 0.43
		added RenderMaterial EMT_REFLECTION_2_LAYER
			pushed burningsvideo to 0.44
		set	EMT_TRANSPARENT_ALPHA_CHANNEL_REF
			to use AlphaRef 0.5 like Direct3D
			
		One Note: in OpenGL there is know difference between sphere_map and reflection layer
		both using GL_TEXTURE_GEN_MODE GL_SPHERE_MAP, whereas in d3d one time using camera_normal
		on sphere and reflection on refletcion_layer.
		
		The visual difference is that on sphere map the "image is not moving" when you rotate the 
		viewer. For Buring i took the opengl visual. always moving
				

	- rename quake3 SEntity to IEntity to be confom with IShader
		even IShader and IEntity are none pure virtual interfaces
		like most irrlicht objects


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2207 dfc29bdd-3216-0410-991c-e03cc46cb475
2009-02-10 15:08:23 +00:00

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// Copyright (C) 2002-2009 Nikolaus Gebhardt / Thomas Alten
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "IrrCompileConfig.h"
#include "IBurningShader.h"
#ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
// compile flag for this file
#undef USE_ZBUFFER
#undef IPOL_Z
#undef CMP_Z
#undef WRITE_Z
#undef IPOL_W
#undef CMP_W
#undef WRITE_W
#undef SUBTEXEL
#undef INVERSE_W
#undef IPOL_C0
#undef IPOL_T0
#undef IPOL_T1
// define render case
#define SUBTEXEL
#define INVERSE_W
#define USE_ZBUFFER
#define IPOL_W
#define CMP_W
#define WRITE_W
//#define IPOL_C0
#define IPOL_T0
#define IPOL_T1
// apply global override
#ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
#undef INVERSE_W
#endif
#ifndef SOFTWARE_DRIVER_2_SUBTEXEL
#undef SUBTEXEL
#endif
#ifndef SOFTWARE_DRIVER_2_USE_VERTEX_COLOR
#undef IPOL_C0
#endif
#if !defined ( SOFTWARE_DRIVER_2_USE_WBUFFER ) && defined ( USE_ZBUFFER )
#ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
#undef IPOL_W
#endif
#define IPOL_Z
#ifdef CMP_W
#undef CMP_W
#define CMP_Z
#endif
#ifdef WRITE_W
#undef WRITE_W
#define WRITE_Z
#endif
#endif
namespace irr
{
namespace video
{
class CTRTextureLightMap2_Add : public IBurningShader
{
public:
//! constructor
CTRTextureLightMap2_Add(IDepthBuffer* zbuffer);
//! draws an indexed triangle list
virtual void drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c );
private:
void scanline_bilinear ();
sScanConvertData scan;
sScanLineData line;
};
//! constructor
CTRTextureLightMap2_Add::CTRTextureLightMap2_Add(IDepthBuffer* zbuffer)
: IBurningShader(zbuffer)
{
#ifdef _DEBUG
setDebugName("CTRTextureLightMap2_Add");
#endif
}
/*!
*/
REALINLINE void CTRTextureLightMap2_Add::scanline_bilinear ()
{
tVideoSample *dst;
#ifdef USE_ZBUFFER
fp24 *z;
#endif
s32 xStart;
s32 xEnd;
s32 dx;
#ifdef SUBTEXEL
f32 subPixel;
#endif
#ifdef IPOL_Z
f32 slopeZ;
#endif
#ifdef IPOL_W
fp24 slopeW;
#endif
#ifdef IPOL_C0
sVec4 slopeC;
#endif
#ifdef IPOL_T0
sVec2 slopeT[BURNING_MATERIAL_MAX_TEXTURES];
#endif
// apply top-left fill-convention, left
xStart = core::ceil32( line.x[0] );
xEnd = core::ceil32( line.x[1] ) - 1;
dx = xEnd - xStart;
if ( dx < 0 )
return;
// slopes
const f32 invDeltaX = core::reciprocal_approxim ( line.x[1] - line.x[0] );
#ifdef IPOL_Z
slopeZ = (line.z[1] - line.z[0]) * invDeltaX;
#endif
#ifdef IPOL_W
slopeW = (line.w[1] - line.w[0]) * invDeltaX;
#endif
#ifdef IPOL_C0
slopeC = (line.c[1] - line.c[0]) * invDeltaX;
#endif
#ifdef IPOL_T0
slopeT[0] = (line.t[0][1] - line.t[0][0]) * invDeltaX;
#endif
#ifdef IPOL_T1
slopeT[1] = (line.t[1][1] - line.t[1][0]) * invDeltaX;
#endif
#ifdef SUBTEXEL
subPixel = ( (f32) xStart ) - line.x[0];
#ifdef IPOL_Z
line.z[0] += slopeZ * subPixel;
#endif
#ifdef IPOL_W
line.w[0] += slopeW * subPixel;
#endif
#ifdef IPOL_C0
line.c[0] += slopeC * subPixel;
#endif
#ifdef IPOL_T0
line.t[0][0] += slopeT[0] * subPixel;
#endif
#ifdef IPOL_T1
line.t[1][0] += slopeT[1] * subPixel;
#endif
#endif
dst = (tVideoSample*)RenderTarget->lock() + ( line.y * RenderTarget->getDimension().Width ) + xStart;
#ifdef USE_ZBUFFER
z = (fp24*) DepthBuffer->lock() + ( line.y * RenderTarget->getDimension().Width ) + xStart;
#endif
#ifdef BURNINGVIDEO_RENDERER_FAST
u32 dIndex = ( line.y & 3 ) << 2;
#else
//
tFixPoint r0, g0, b0;
tFixPoint r1, g1, b1;
#endif
for ( s32 i = 0; i <= dx; i++ )
{
#ifdef CMP_Z
if ( line.z[0] < z[i] )
#endif
#ifdef CMP_W
if ( line.w[0] >= z[i] )
#endif
{
#ifdef WRITE_Z
z[i] = line.z[0];
#endif
#ifdef WRITE_W
z[i] = line.w[0];
#endif
#ifdef BURNINGVIDEO_RENDERER_FAST
#ifdef INVERSE_W
const f32 inversew = fix_inverse32 ( line.w[0] );
const tFixPointu d = dithermask [ dIndex | ( i ) & 3 ];
dst[i] = PixelAdd32 (
getTexel_plain ( &IT[0], d + tofix ( line.t[0][0].x,inversew),
d + tofix ( line.t[0][0].y,inversew) ),
getTexel_plain ( &IT[1], d + tofix ( line.t[1][0].x,inversew),
d + tofix ( line.t[1][0].y,inversew) )
);
#else
const tFixPointu d = dithermask [ dIndex | ( i ) & 3 ];
dst[i] = PixelAdd32 (
getTexel_plain ( &IT[0], d + tofix ( line.t[0][0].x),
d + tofix ( line.t[0][0].y) ),
getTexel_plain ( &IT[1], d + tofix ( line.t[1][0].x),
d + tofix ( line.t[1][0].y) )
);
#endif
#else
const f32 inversew = fix_inverse32 ( line.w[0] );
getSample_texture ( r0, g0, b0, &IT[0], tofix ( line.t[0][0].x,inversew), tofix ( line.t[0][0].y,inversew) );
getSample_texture ( r1, g1, b1, &IT[1], tofix ( line.t[0][1].x,inversew), tofix ( line.t[0][1].y,inversew) );
dst[i] = fix_to_color ( clampfix_maxcolor ( r0 + r1 ),
clampfix_maxcolor ( g0 + g1 ),
clampfix_maxcolor ( b0 + b1 )
);
#endif
}
#ifdef IPOL_Z
line.z[0] += slopeZ;
#endif
#ifdef IPOL_W
line.w[0] += slopeW;
#endif
#ifdef IPOL_C0
line.c[0] += slopeC;
#endif
#ifdef IPOL_T0
line.t[0][0] += slopeT[0];
#endif
#ifdef IPOL_T1
line.t[1][0] += slopeT[1];
#endif
}
}
void CTRTextureLightMap2_Add::drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c )
{
// sort on height, y
if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
if ( F32_A_GREATER_B ( b->Pos.y , c->Pos.y ) ) swapVertexPointer(&b, &c);
if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
// calculate delta y of the edges
scan.invDeltaY[0] = core::reciprocal ( c->Pos.y - a->Pos.y );
scan.invDeltaY[1] = core::reciprocal ( b->Pos.y - a->Pos.y );
scan.invDeltaY[2] = core::reciprocal ( c->Pos.y - b->Pos.y );
if ( F32_LOWER_EQUAL_0 ( scan.invDeltaY[0] ) )
return;
// find if the major edge is left or right aligned
f32 temp[4];
temp[0] = a->Pos.x - c->Pos.x;
temp[1] = a->Pos.y - c->Pos.y;
temp[2] = b->Pos.x - a->Pos.x;
temp[3] = b->Pos.y - a->Pos.y;
scan.left = ( temp[0] * temp[3] - temp[1] * temp[2] ) > (f32) 0.0 ? 0 : 1;
scan.right = 1 - scan.left;
// calculate slopes for the major edge
scan.slopeX[0] = (c->Pos.x - a->Pos.x) * scan.invDeltaY[0];
scan.x[0] = a->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[0] = (c->Pos.z - a->Pos.z) * scan.invDeltaY[0];
scan.z[0] = a->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[0] = (c->Pos.w - a->Pos.w) * scan.invDeltaY[0];
scan.w[0] = a->Pos.w;
#endif
#ifdef IPOL_C0
scan.slopeC[0] = (c->Color[0] - a->Color[0]) * scan.invDeltaY[0];
scan.c[0] = a->Color[0];
#endif
#ifdef IPOL_T0
scan.slopeT[0][0] = (c->Tex[0] - a->Tex[0]) * scan.invDeltaY[0];
scan.t[0][0] = a->Tex[0];
#endif
#ifdef IPOL_T1
scan.slopeT[1][0] = (c->Tex[1] - a->Tex[1]) * scan.invDeltaY[0];
scan.t[1][0] = a->Tex[1];
#endif
// top left fill convention y run
s32 yStart;
s32 yEnd;
#ifdef SUBTEXEL
f32 subPixel;
#endif
// rasterize upper sub-triangle
if ( (f32) 0.0 != scan.invDeltaY[1] )
{
// calculate slopes for top edge
scan.slopeX[1] = (b->Pos.x - a->Pos.x) * scan.invDeltaY[1];
scan.x[1] = a->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[1] = (b->Pos.z - a->Pos.z) * scan.invDeltaY[1];
scan.z[1] = a->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[1] = (b->Pos.w - a->Pos.w) * scan.invDeltaY[1];
scan.w[1] = a->Pos.w;
#endif
#ifdef IPOL_C0
scan.slopeC[1] = (b->Color[0] - a->Color[0]) * scan.invDeltaY[1];
scan.c[1] = a->Color[0];
#endif
#ifdef IPOL_T0
scan.slopeT[0][1] = (b->Tex[0] - a->Tex[0]) * scan.invDeltaY[1];
scan.t[0][1] = a->Tex[0];
#endif
#ifdef IPOL_T1
scan.slopeT[1][1] = (b->Tex[1] - a->Tex[1]) * scan.invDeltaY[1];
scan.t[1][1] = a->Tex[1];
#endif
// apply top-left fill convention, top part
yStart = core::ceil32( a->Pos.y );
yEnd = core::ceil32( b->Pos.y ) - 1;
#ifdef SUBTEXEL
subPixel = ( (f32) yStart ) - a->Pos.y;
// correct to pixel center
scan.x[0] += scan.slopeX[0] * subPixel;
scan.x[1] += scan.slopeX[1] * subPixel;
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0] * subPixel;
scan.z[1] += scan.slopeZ[1] * subPixel;
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0] * subPixel;
scan.w[1] += scan.slopeW[1] * subPixel;
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0] * subPixel;
scan.c[1] += scan.slopeC[1] * subPixel;
#endif
#ifdef IPOL_T0
scan.t[0][0] += scan.slopeT[0][0] * subPixel;
scan.t[0][1] += scan.slopeT[0][1] * subPixel;
#endif
#ifdef IPOL_T1
scan.t[1][0] += scan.slopeT[1][0] * subPixel;
scan.t[1][1] += scan.slopeT[1][1] * subPixel;
#endif
#endif
// rasterize the edge scanlines
for( line.y = yStart; line.y <= yEnd; ++line.y)
{
line.x[scan.left] = scan.x[0];
line.x[scan.right] = scan.x[1];
#ifdef IPOL_Z
line.z[scan.left] = scan.z[0];
line.z[scan.right] = scan.z[1];
#endif
#ifdef IPOL_W
line.w[scan.left] = scan.w[0];
line.w[scan.right] = scan.w[1];
#endif
#ifdef IPOL_C0
line.c[scan.left] = scan.c[0];
line.c[scan.right] = scan.c[1];
#endif
#ifdef IPOL_T0
line.t[0][scan.left] = scan.t[0][0];
line.t[0][scan.right] = scan.t[0][1];
#endif
#ifdef IPOL_T1
line.t[1][scan.left] = scan.t[1][0];
line.t[1][scan.right] = scan.t[1][1];
#endif
// render a scanline
scanline_bilinear ();
scan.x[0] += scan.slopeX[0];
scan.x[1] += scan.slopeX[1];
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0];
scan.z[1] += scan.slopeZ[1];
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0];
scan.w[1] += scan.slopeW[1];
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0];
scan.c[1] += scan.slopeC[1];
#endif
#ifdef IPOL_T0
scan.t[0][0] += scan.slopeT[0][0];
scan.t[0][1] += scan.slopeT[0][1];
#endif
#ifdef IPOL_T1
scan.t[1][0] += scan.slopeT[1][0];
scan.t[1][1] += scan.slopeT[1][1];
#endif
}
}
// rasterize lower sub-triangle
if ( (f32) 0.0 != scan.invDeltaY[2] )
{
// advance to middle point
if( (f32) 0.0 != scan.invDeltaY[1] )
{
temp[0] = b->Pos.y - a->Pos.y; // dy
scan.x[0] = a->Pos.x + scan.slopeX[0] * temp[0];
#ifdef IPOL_Z
scan.z[0] = a->Pos.z + scan.slopeZ[0] * temp[0];
#endif
#ifdef IPOL_W
scan.w[0] = a->Pos.w + scan.slopeW[0] * temp[0];
#endif
#ifdef IPOL_C0
scan.c[0] = a->Color[0] + scan.slopeC[0] * temp[0];
#endif
#ifdef IPOL_T0
scan.t[0][0] = a->Tex[0] + scan.slopeT[0][0] * temp[0];
#endif
#ifdef IPOL_T1
scan.t[1][0] = a->Tex[1] + scan.slopeT[1][0] * temp[0];
#endif
}
// calculate slopes for bottom edge
scan.slopeX[1] = (c->Pos.x - b->Pos.x) * scan.invDeltaY[2];
scan.x[1] = b->Pos.x;
#ifdef IPOL_Z
scan.slopeZ[1] = (c->Pos.z - b->Pos.z) * scan.invDeltaY[2];
scan.z[1] = b->Pos.z;
#endif
#ifdef IPOL_W
scan.slopeW[1] = (c->Pos.w - b->Pos.w) * scan.invDeltaY[2];
scan.w[1] = b->Pos.w;
#endif
#ifdef IPOL_C0
scan.slopeC[1] = (c->Color[0] - b->Color[0]) * scan.invDeltaY[2];
scan.c[1] = b->Color[0];
#endif
#ifdef IPOL_T0
scan.slopeT[0][1] = (c->Tex[0] - b->Tex[0]) * scan.invDeltaY[2];
scan.t[0][1] = b->Tex[0];
#endif
#ifdef IPOL_T1
scan.slopeT[1][1] = (c->Tex[1] - b->Tex[1]) * scan.invDeltaY[2];
scan.t[1][1] = b->Tex[1];
#endif
// apply top-left fill convention, top part
yStart = core::ceil32( b->Pos.y );
yEnd = core::ceil32( c->Pos.y ) - 1;
#ifdef SUBTEXEL
subPixel = ( (f32) yStart ) - b->Pos.y;
// correct to pixel center
scan.x[0] += scan.slopeX[0] * subPixel;
scan.x[1] += scan.slopeX[1] * subPixel;
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0] * subPixel;
scan.z[1] += scan.slopeZ[1] * subPixel;
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0] * subPixel;
scan.w[1] += scan.slopeW[1] * subPixel;
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0] * subPixel;
scan.c[1] += scan.slopeC[1] * subPixel;
#endif
#ifdef IPOL_T0
scan.t[0][0] += scan.slopeT[0][0] * subPixel;
scan.t[0][1] += scan.slopeT[0][1] * subPixel;
#endif
#ifdef IPOL_T1
scan.t[1][0] += scan.slopeT[1][0] * subPixel;
scan.t[1][1] += scan.slopeT[1][1] * subPixel;
#endif
#endif
// rasterize the edge scanlines
for( line.y = yStart; line.y <= yEnd; ++line.y)
{
line.x[scan.left] = scan.x[0];
line.x[scan.right] = scan.x[1];
#ifdef IPOL_Z
line.z[scan.left] = scan.z[0];
line.z[scan.right] = scan.z[1];
#endif
#ifdef IPOL_W
line.w[scan.left] = scan.w[0];
line.w[scan.right] = scan.w[1];
#endif
#ifdef IPOL_C0
line.c[scan.left] = scan.c[0];
line.c[scan.right] = scan.c[1];
#endif
#ifdef IPOL_T0
line.t[0][scan.left] = scan.t[0][0];
line.t[0][scan.right] = scan.t[0][1];
#endif
#ifdef IPOL_T1
line.t[1][scan.left] = scan.t[1][0];
line.t[1][scan.right] = scan.t[1][1];
#endif
// render a scanline
scanline_bilinear ();
scan.x[0] += scan.slopeX[0];
scan.x[1] += scan.slopeX[1];
#ifdef IPOL_Z
scan.z[0] += scan.slopeZ[0];
scan.z[1] += scan.slopeZ[1];
#endif
#ifdef IPOL_W
scan.w[0] += scan.slopeW[0];
scan.w[1] += scan.slopeW[1];
#endif
#ifdef IPOL_C0
scan.c[0] += scan.slopeC[0];
scan.c[1] += scan.slopeC[1];
#endif
#ifdef IPOL_T0
scan.t[0][0] += scan.slopeT[0][0];
scan.t[0][1] += scan.slopeT[0][1];
#endif
#ifdef IPOL_T1
scan.t[1][0] += scan.slopeT[1][0];
scan.t[1][1] += scan.slopeT[1][1];
#endif
}
}
}
} // end namespace video
} // end namespace irr
#endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
namespace irr
{
namespace video
{
//! creates a flat triangle renderer
IBurningShader* createTriangleRendererTextureLightMap2_Add(IDepthBuffer* zbuffer)
{
#ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
return new CTRTextureLightMap2_Add(zbuffer);
#else
return 0;
#endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
}
} // end namespace video
} // end namespace irr
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