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Change order of test for is_plantation as per feedback.

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This commit is contained in:
James.Hester 2019-11-21 20:36:56 +11:00
parent 81e93448e3
commit 595eb3efea
2 changed files with 84 additions and 84 deletions
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84
simgear/scene/tgdb/SGNodeTriangles.hxx
View File

@ -335,48 +335,7 @@ public:
if (area <= SGLimitsf::min())
continue;
if (!is_plantation) {
// Determine the number of trees, taking into account vegetation
// density (which is linear) and the slope density factor.
// Use a zombie door method to create the proper random chance
// of a tree being created for partial values.
int woodcount = (int) (vegetation_density * vegetation_density *
slope_density *
area / wood_coverage + mt_rand(&seed));
for (int j = 0; j < woodcount; j++) {
// Use barycentric coordinates
float a = mt_rand(&seed);
float b = mt_rand(&seed);
if ( a + b > 1.0f ) {
a = 1.0f - a;
b = 1.0f - b;
}
float c = 1.0f - a - b;
SGVec3f randomPoint = a*v0 + b*v1 + c*v2;
if (object_mask != NULL) {
SGVec2f texCoord = a*t0 + b*t1 + c*t2;
// Check this random point against the object mask
// green (for trees) channel.
osg::Image* img = object_mask->getImage();
unsigned int x = (int) (img->s() * texCoord.x()) % img->s();
unsigned int y = (int) (img->t() * texCoord.y()) % img->t();
if (mt_rand(&seed) < img->getColor(x, y).g()) {
// The red channel contains the rotation for this object
points.push_back(randomPoint);
normals.push_back(normalize(normal));
}
} else {
points.push_back(randomPoint);
normals.push_back(normalize(normal));
}
}
} else { // regularly-spaced vegetation
if (is_plantation) { // regularly-spaced vegetation
// separate vegetation in integral 1m units
int separation = (int) ceil(sqrt(wood_coverage));
float max_x = ceil(max(max(v1.x(),v2.x()),v0.x()));
@ -427,6 +386,47 @@ public:
}
}
}
} else {
// Determine the number of trees, taking into account vegetation
// density (which is linear) and the slope density factor.
// Use a zombie door method to create the proper random chance
// of a tree being created for partial values.
int woodcount = (int) (vegetation_density * vegetation_density *
slope_density *
area / wood_coverage + mt_rand(&seed));
for (int j = 0; j < woodcount; j++) {
// Use barycentric coordinates
float a = mt_rand(&seed);
float b = mt_rand(&seed);
if ( a + b > 1.0f ) {
a = 1.0f - a;
b = 1.0f - b;
}
float c = 1.0f - a - b;
SGVec3f randomPoint = a*v0 + b*v1 + c*v2;
if (object_mask != NULL) {
SGVec2f texCoord = a*t0 + b*t1 + c*t2;
// Check this random point against the object mask
// green (for trees) channel.
osg::Image* img = object_mask->getImage();
unsigned int x = (int) (img->s() * texCoord.x()) % img->s();
unsigned int y = (int) (img->t() * texCoord.y()) % img->t();
if (mt_rand(&seed) < img->getColor(x, y).g()) {
// The red channel contains the rotation for this object
points.push_back(randomPoint);
normals.push_back(normalize(normal));
}
} else {
points.push_back(randomPoint);
normals.push_back(normalize(normal));
}
}
}
}
}

84
simgear/scene/tgdb/SGTexturedTriangleBin.hxx
View File

@ -250,48 +250,7 @@ public:
float area = 0.5f*length(normal);
if (area <= SGLimitsf::min())
continue;
if (!is_plantation) {
// Determine the number of trees, taking into account vegetation
// density (which is linear) and the slope density factor.
// Use a zombie door method to create the proper random chance
// of a tree being created for partial values.
int woodcount = (int) (vegetation_density * vegetation_density *
slope_density *
area / wood_coverage + mt_rand(&seed));
for (int j = 0; j < woodcount; j++) {
float a = mt_rand(&seed);
float b = mt_rand(&seed);
if ( a + b > 1.0f ) {
a = 1.0f - a;
b = 1.0f - b;
}
float c = 1.0f - a - b;
SGVec3f randomPoint = a*v0 + b*v1 + c*v2;
if (object_mask != NULL) {
SGVec2f texCoord = a*t0 + b*t1 + c*t2;
// Check this random point against the object mask
// green (for trees) channel.
osg::Image* img = object_mask->getImage();
unsigned int x = (int) (img->s() * texCoord.x()) % img->s();
unsigned int y = (int) (img->t() * texCoord.y()) % img->t();
if (mt_rand(&seed) < img->getColor(x, y).g()) {
// The red channel contains the rotation for this object
points.push_back(randomPoint);
normals.push_back(normalize(normal));
}
} else {
points.push_back(randomPoint);
normals.push_back(normalize(normal));
}
}
} else { // regularly-spaced vegetation
if (is_plantation) { // regularly-spaced vegetation
int separation = (int) ceil(sqrt(wood_coverage));
float max_x = ceil(max(max(v1.x(),v2.x()),v0.x()));
@ -344,6 +303,47 @@ public:
}
}
}
} else {
// Determine the number of trees, taking into account vegetation
// density (which is linear) and the slope density factor.
// Use a zombie door method to create the proper random chance
// of a tree being created for partial values.
int woodcount = (int) (vegetation_density * vegetation_density *
slope_density *
area / wood_coverage + mt_rand(&seed));
for (int j = 0; j < woodcount; j++) {
float a = mt_rand(&seed);
float b = mt_rand(&seed);
if ( a + b > 1.0f ) {
a = 1.0f - a;
b = 1.0f - b;
}
float c = 1.0f - a - b;
SGVec3f randomPoint = a*v0 + b*v1 + c*v2;
if (object_mask != NULL) {
SGVec2f texCoord = a*t0 + b*t1 + c*t2;
// Check this random point against the object mask
// green (for trees) channel.
osg::Image* img = object_mask->getImage();
unsigned int x = (int) (img->s() * texCoord.x()) % img->s();
unsigned int y = (int) (img->t() * texCoord.y()) % img->t();
if (mt_rand(&seed) < img->getColor(x, y).g()) {
// The red channel contains the rotation for this object
points.push_back(randomPoint);
normals.push_back(normalize(normal));
}
} else {
points.push_back(randomPoint);
normals.push_back(normalize(normal));
}
}
}
}
}