FGFS-4.1/OpenSceneGraph
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Basic shadow volume alogirthm implemented in example.

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This commit is contained in:
Robert Osfield
2006-11-30 16:30:24 +00:00
parent 808047ee1b
commit a9d18d01db
3 changed files with 130 additions and 48 deletions
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15
src/osg/ShapeDrawable.cpp
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@@ -962,7 +962,7 @@ void DrawShapeVisitor::apply(const HeightField& field)
// draw skirt at begining if required.
if (field.getSkirtHeight()!=0.0f)
{
vertTop.set(0.0f,dy*(float)row+dy,field.getHeight(0,row+1)-field.getSkirtHeight());
vertTop.set(0.0f,dy*(float)(row+1),field.getHeight(0,row+1)-field.getSkirtHeight());
normTop.set(field.getNormal(0,row+1));
vertBase.set(0.0f,dy*(float)row,field.getHeight(0,row)-field.getSkirtHeight());
@@ -979,7 +979,7 @@ void DrawShapeVisitor::apply(const HeightField& field)
for(unsigned int col=0;col<field.getNumColumns();++col,u+=du)
{
vertTop.set(dx*(float)col,dy*(float)row+dy,field.getHeight(col,row+1));
vertTop.set(dx*(float)col,dy*(float)(row+1),field.getHeight(col,row+1));
normTop.set(field.getNormal(col,row+1));
vertBase.set(dx*(float)col,dy*(float)row,field.getHeight(col,row));
@@ -1334,6 +1334,15 @@ void PrimitiveShapeVisitor::apply(const Sphere& sphere)
unsigned int numSegments = 40;
unsigned int numRows = 20;
float ratio = (_hints ? _hints->getDetailRatio() : 1.0f);
if (ratio > 0.0f && ratio != 1.0f) {
numRows = (unsigned int) (numRows * ratio);
if (numRows < MIN_NUM_ROWS)
numRows = MIN_NUM_ROWS;
numSegments = (unsigned int) (numSegments * ratio);
if (numSegments < MIN_NUM_SEGMENTS)
numSegments = MIN_NUM_SEGMENTS;
}
float lDelta = osg::PI/(float)numRows;
float vDelta = 1.0f/(float)numRows;
@@ -1708,7 +1717,7 @@ void PrimitiveShapeVisitor::apply(const HeightField& field)
for(unsigned int col=0;col<field.getNumColumns();++col)
{
Vec3 vertTop(dx*(float)col,dy*(float)row+dy,field.getHeight(col,row+1));
Vec3 vertTop(dx*(float)col,dy*(float)(row+1),field.getHeight(col,row+1));
Vec3 vertBase(dx*(float)col,dy*(float)row,field.getHeight(col,row));
_functor.vertex(vertTop*matrix);