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WS30 - Line feature texturing

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This commit is contained in:
Stuart Buchanan 2021-10-01 22:03:47 +01:00
parent 0f946abc36
commit e7cca0c407
4 changed files with 34 additions and 21 deletions
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5
simgear/scene/material/mat.cxx
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@ -284,6 +284,11 @@ SGMaterial::read_properties(const SGReaderWriterOptions* options,
light_edge_colour[2] = props->getDoubleValue("light-edge-color/b", 1.0); light_edge_colour[2] = props->getDoubleValue("light-edge-color/b", 1.0);
light_edge_colour[3] = props->getDoubleValue("light-edge-color/a", 1.0); light_edge_colour[3] = props->getDoubleValue("light-edge-color/a", 1.0);
// Line feature texture coordinates
line_feature_tex_x0 = props->getDoubleValue("line-feature-tex-x0", 0.0);
line_feature_tex_x1 = props->getDoubleValue("line-feature-tex-x1", 0.0);
line_feature_offset_m = props->getDoubleValue("line-feature-offset-m", 1.0);
// Building properties // Building properties
building_coverage = props->getDoubleValue("building-coverage", 0.0); building_coverage = props->getDoubleValue("building-coverage", 0.0);
building_spacing = props->getDoubleValue("building-spacing-m", 5.0); building_spacing = props->getDoubleValue("building-spacing-m", 5.0);

11
simgear/scene/material/mat.hxx
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@ -176,9 +176,7 @@ public:
inline double get_light_coverage () const { return light_coverage; } inline double get_light_coverage () const { return light_coverage; }
/** /**
* Get the edge lighting for Roads etc. * Get the edge lighting and other parameters for line features (Roads, Railways) etc.
*
* @return The spacing (in m) between individual lights
*/ */
inline double get_light_edge_spacing_m () const { return light_edge_spacing_m; } inline double get_light_edge_spacing_m () const { return light_edge_spacing_m; }
inline double get_light_edge_size_cm() const { return light_edge_size_cm; }; inline double get_light_edge_size_cm() const { return light_edge_size_cm; };
@ -188,6 +186,10 @@ public:
inline double get_light_edge_angle_vertical_deg() const { return light_edge_angle_vertical_deg; }; inline double get_light_edge_angle_vertical_deg() const { return light_edge_angle_vertical_deg; };
inline SGVec4f get_light_edge_colour() const { return light_edge_colour; }; inline SGVec4f get_light_edge_colour() const { return light_edge_colour; };
inline bool get_light_edge_offset() const { return light_edge_offset; }; inline bool get_light_edge_offset() const { return light_edge_offset; };
inline double get_line_feature_tex_x0() const { return line_feature_tex_x0; };
inline double get_line_feature_tex_x1() const { return line_feature_tex_x1; };
inline double get_line_feature_offset_m() const { return line_feature_offset_m; };
/** /**
* Get the building coverage. * Get the building coverage.
@ -454,6 +456,9 @@ private:
double light_edge_angle_vertical_deg; double light_edge_angle_vertical_deg;
SGVec4f light_edge_colour; SGVec4f light_edge_colour;
bool light_edge_offset; bool light_edge_offset;
double line_feature_tex_x0;
double line_feature_tex_x1;
double line_feature_offset_m;
// coverage of buildings // coverage of buildings
double building_coverage; double building_coverage;

31
simgear/scene/tgdb/VPBTechnique.cxx
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@ -1674,11 +1674,13 @@ void VPBTechnique::applyLineFeatures(BufferData& buffer, Locator* masterLocator)
continue; continue;
} }
const unsigned int xsize = mat->get_xsize();
const unsigned int ysize = mat->get_ysize(); const unsigned int ysize = mat->get_ysize();
const bool light_edge_offset = mat->get_light_edge_offset(); const bool light_edge_offset = mat->get_light_edge_offset();
const double light_edge_spacing = mat->get_light_edge_spacing_m(); const double light_edge_spacing = mat->get_light_edge_spacing_m();
const double light_edge_height = mat->get_light_edge_height_m(); const double light_edge_height = mat->get_light_edge_height_m();
const double x0 = mat->get_line_feature_tex_x0();
const double x1 = mat->get_line_feature_tex_x1();
const double elevation_offset_m = mat->get_line_feature_offset_m();
// Generate a geometry for this set of roads. // Generate a geometry for this set of roads.
osg::Vec3Array* v = new osg::Vec3Array; osg::Vec3Array* v = new osg::Vec3Array;
@ -1690,7 +1692,7 @@ void VPBTechnique::applyLineFeatures(BufferData& buffer, Locator* masterLocator)
auto lineFeatures = rb->getLineFeatures(); auto lineFeatures = rb->getLineFeatures();
for (auto r = lineFeatures.begin(); r != lineFeatures.end(); ++r) { for (auto r = lineFeatures.begin(); r != lineFeatures.end(); ++r) {
if (r->_width > minWidth) generateLineFeature(buffer, masterLocator, *r, world, v, t, n, lights, xsize, ysize, light_edge_spacing, light_edge_height, light_edge_offset); if (r->_width > minWidth) generateLineFeature(buffer, masterLocator, *r, world, v, t, n, lights, x0, x1, ysize, light_edge_spacing, light_edge_height, light_edge_offset, elevation_offset_m);
} }
if (v->size() == 0) continue; if (v->size() == 0) continue;
@ -1736,7 +1738,7 @@ void VPBTechnique::applyLineFeatures(BufferData& buffer, Locator* masterLocator)
if (lightbin.getNumLights() > 0) buffer._transform->addChild(createLights(lightbin, osg::Matrix::identity(), _options)); if (lightbin.getNumLights() > 0) buffer._transform->addChild(createLights(lightbin, osg::Matrix::identity(), _options));
} }
void VPBTechnique::generateLineFeature(BufferData& buffer, Locator* masterLocator, LineFeatureBin::LineFeature road, osg::Vec3d modelCenter, osg::Vec3Array* v, osg::Vec2Array* t, osg::Vec3Array* n, osg::Vec3Array* lights, unsigned int xsize, unsigned int ysize, double light_edge_spacing, double light_edge_height, bool light_edge_offset) void VPBTechnique::generateLineFeature(BufferData& buffer, Locator* masterLocator, LineFeatureBin::LineFeature road, osg::Vec3d modelCenter, osg::Vec3Array* v, osg::Vec2Array* t, osg::Vec3Array* n, osg::Vec3Array* lights, double x0, double x1, unsigned int ysize, double light_edge_spacing, double light_edge_height, bool light_edge_offset, double elevation_offset_m)
{ {
// We're in Earth-centered coordinates, so "up" is simply directly away from (0,0,0) // We're in Earth-centered coordinates, so "up" is simply directly away from (0,0,0)
osg::Vec3d up = modelCenter; osg::Vec3d up = modelCenter;
@ -1794,13 +1796,12 @@ void VPBTechnique::generateLineFeature(BufferData& buffer, Locator* masterLocato
spanwise.normalize(); spanwise.normalize();
// Define the road extents // Define the road extents
const osg::Vec3d a = start - last_spanwise * road._width * 0.5 + up; const osg::Vec3d a = start - last_spanwise * road._width * 0.5 + up * elevation_offset_m;
const osg::Vec3d b = start + last_spanwise * road._width * 0.5 + up; const osg::Vec3d b = start + last_spanwise * road._width * 0.5 + up * elevation_offset_m;
const osg::Vec3d c = end - spanwise * road._width * 0.5 + up; const osg::Vec3d c = end - spanwise * road._width * 0.5 + up * elevation_offset_m;
const osg::Vec3d d = end + spanwise * road._width * 0.5 + up; const osg::Vec3d d = end + spanwise * road._width * 0.5 + up * elevation_offset_m;
// Determine the x and y texture coordinates for the edges // Determine the x and y texture coordinates for the edges
const float xTex = 1.0 / xsize;
const float yTexA = yTexBaseA + (c-a).length() / ysize; const float yTexA = yTexBaseA + (c-a).length() / ysize;
const float yTexB = yTexBaseB + (d-b).length() / ysize; const float yTexB = yTexBaseB + (d-b).length() / ysize;
@ -1809,17 +1810,17 @@ void VPBTechnique::generateLineFeature(BufferData& buffer, Locator* masterLocato
v->push_back(b); v->push_back(b);
v->push_back(c); v->push_back(c);
t->push_back(osg::Vec2d(0, yTexBaseA)); t->push_back(osg::Vec2d(x0, yTexBaseA));
t->push_back(osg::Vec2d(xTex, yTexBaseB)); t->push_back(osg::Vec2d(x1, yTexBaseB));
t->push_back(osg::Vec2d(0, yTexA)); t->push_back(osg::Vec2d(x0, yTexA));
v->push_back(b); v->push_back(b);
v->push_back(d); v->push_back(d);
v->push_back(c); v->push_back(c);
t->push_back(osg::Vec2d(xTex, yTexBaseB)); t->push_back(osg::Vec2d(x1, yTexBaseB));
t->push_back(osg::Vec2d(xTex, yTexB)); t->push_back(osg::Vec2d(x1, yTexB));
t->push_back(osg::Vec2d(0, yTexA)); t->push_back(osg::Vec2d(x0, yTexA));
// Normal is straight from the quad // Normal is straight from the quad
osg::Vec3d normal = -(end-start)^spanwise; osg::Vec3d normal = -(end-start)^spanwise;
@ -2211,7 +2212,7 @@ void VPBTechnique::generateCoastlineFeature(BufferData& buffer, Locator* masterL
t->push_back(osg::Vec2d(xTex, yTexBaseB)); t->push_back(osg::Vec2d(xTex, yTexBaseB));
t->push_back(osg::Vec2d(xTex, yTexB)); t->push_back(osg::Vec2d(xTex, yTexB));
t->push_back(osg::Vec2d(0, yTexBaseA)); t->push_back(osg::Vec2d(0, yTexA));
// Normal is straight from the quad // Normal is straight from the quad
osg::Vec3d normal = -(end-start)^spanwise; osg::Vec3d normal = -(end-start)^spanwise;

8
simgear/scene/tgdb/VPBTechnique.hxx
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@ -147,12 +147,14 @@ class VPBTechnique : public TerrainTechnique
osg::Vec3Array* v, osg::Vec3Array* v,
osg::Vec2Array* t, osg::Vec2Array* t,
osg::Vec3Array* n, osg::Vec3Array* n,
osg::Vec3Array* lights, osg::Vec3Array* lights,
unsigned int xsize, double x0,
double x1,
unsigned int ysize, unsigned int ysize,
double light_edge_spacing, double light_edge_spacing,
double light_edge_height, double light_edge_height,
bool light_edge_offset); bool light_edge_offset,
double elevation_offset_m);
virtual void applyAreaFeatures(BufferData& buffer, Locator* masterLocator); virtual void applyAreaFeatures(BufferData& buffer, Locator* masterLocator);
virtual void generateAreaFeature(BufferData& buffer, virtual void generateAreaFeature(BufferData& buffer,