using namespace simgear;
using namespace osg;
+using namespace std;
+
namespace
{
EffectMap effectMap;
}
-double SGNewCloud::sprite_density = 1.0;
+float SGNewCloud::sprite_density = 1.0;
SGNewCloud::SGNewCloud(const SGPath &texture_root, const SGPropertyNode *cld_def)
{
- min_width = cld_def->getDoubleValue("min-cloud-width-m", 500.0);
- max_width = cld_def->getDoubleValue("max-cloud-width-m", min_width*2);
- min_height = cld_def->getDoubleValue("min-cloud-height-m", 400.0);
- max_height = cld_def->getDoubleValue("max-cloud-height-m", min_height*2);
- min_sprite_width = cld_def->getDoubleValue("min-sprite-width-m", 200.0);
- max_sprite_width = cld_def->getDoubleValue("max-sprite-width-m", min_sprite_width*1.5);
- min_sprite_height = cld_def->getDoubleValue("min-sprite-height-m", 150);
- max_sprite_height = cld_def->getDoubleValue("max-sprite-height-m", min_sprite_height*1.5);
+ min_width = cld_def->getFloatValue("min-cloud-width-m", 500.0);
+ max_width = cld_def->getFloatValue("max-cloud-width-m", min_width*2);
+ min_height = cld_def->getFloatValue("min-cloud-height-m", 400.0);
+ max_height = cld_def->getFloatValue("max-cloud-height-m", min_height*2);
+ min_sprite_width = cld_def->getFloatValue("min-sprite-width-m", 200.0);
+ max_sprite_width = cld_def->getFloatValue("max-sprite-width-m", min_sprite_width*1.5);
+ min_sprite_height = cld_def->getFloatValue("min-sprite-height-m", 150);
+ max_sprite_height = cld_def->getFloatValue("max-sprite-height-m", min_sprite_height*1.5);
num_sprites = cld_def->getIntValue("num-sprites", 20);
num_textures_x = cld_def->getIntValue("num-textures-x", 4);
num_textures_y = cld_def->getIntValue("num-textures-y", 4);
height_map_texture = cld_def->getBoolValue("height-map-texture", false);
- bottom_shade = cld_def->getDoubleValue("bottom-shade", 1.0);
- zscale = cld_def->getDoubleValue("z-scale", 1.0);
+
+ min_bottom_lighting_factor = cld_def->getFloatValue("min-bottom-lighting-factor", 1.0);
+ max_bottom_lighting_factor = cld_def->getFloatValue("max-bottom-lighting-factor", min(min_bottom_lighting_factor + 0.1, 1.0));
+
+ min_middle_lighting_factor = cld_def->getFloatValue("min-middle-lighting-factor", 1.0);
+ max_middle_lighting_factor = cld_def->getFloatValue("max-middle-lighting-factor", min(min_middle_lighting_factor + 0.1, 1.0));
+
+ min_top_lighting_factor = cld_def->getFloatValue("min-top-lighting-factor", 1.0);
+ max_top_lighting_factor = cld_def->getFloatValue("max-top-lighting-factor", min(min_top_lighting_factor + 0.1, 1.0));
+
+ min_shade_lighting_factor = cld_def->getFloatValue("min-shade-lighting-factor", 0.5);
+ max_shade_lighting_factor = cld_def->getFloatValue("max-shade-lighting-factor", min(min_shade_lighting_factor + 0.1, 1.0));
+
+ zscale = cld_def->getFloatValue("z-scale", 1.0);
texture = cld_def->getStringValue("texture", "cl_cumulus.png");
// Create a new Effect for the texture, if required.
osg::ref_ptr<EffectGeode> geode = new EffectGeode;
- CloudShaderGeometry* sg = new CloudShaderGeometry(num_textures_x,
- num_textures_y,
- max_width + max_sprite_width,
- max_height + max_sprite_height,
- zscale);
-
// Determine how big this specific cloud instance is. Note that we subtract
// the sprite size because the width/height is used to define the limits of
// the center of the sprites, not their edges.
float width = min_width + sg_random() * (max_width - min_width) - min_sprite_width;
float height = min_height + sg_random() * (max_height - min_height) - min_sprite_height;
+ if (width < 0.0) { width = 0.0; }
+ if (height < 0.0) { height = 0.0; }
+
+ // Determine appropriate shading factors
+ float top_factor = min_top_lighting_factor + sg_random() * (max_top_lighting_factor - min_top_lighting_factor);
+ float middle_factor = min_middle_lighting_factor + sg_random() * (max_middle_lighting_factor - min_middle_lighting_factor);
+ float bottom_factor = min_bottom_lighting_factor + sg_random() * (max_bottom_lighting_factor - min_bottom_lighting_factor);
+ float shade_factor = min_shade_lighting_factor + sg_random() * (max_shade_lighting_factor - min_shade_lighting_factor);
+
+ //printf("Cloud: %2f, %2f, %2f, %2f\n", top_factor, middle_factor, bottom_factor, shade_factor);
+
+ CloudShaderGeometry* sg = new CloudShaderGeometry(num_textures_x,
+ num_textures_y,
+ max_width + max_sprite_width,
+ max_height + max_sprite_height,
+ top_factor,
+ middle_factor,
+ bottom_factor,
+ shade_factor,
+ height,
+ zscale);
+
// Determine the cull distance. This is used to remove sprites that are too close together.
// The value is squared as we use vector calculations.
float cull_distance_squared = min_sprite_height * min_sprite_height * 0.1f;
// The number of sprites we actually use is a function of the (user-controlled) density
- int n_sprites = num_sprites * sprite_density * (0.5 + sg_random());
+ int n_sprites = num_sprites * sprite_density * (0.5f + sg_random());
for (int i = 0; i < n_sprites; i++)
{
y = 0;
z = height * 0.5;
} else {
- double theta = sg_random() * SGD_2PI;
- double elev = sg_random() * SGD_PI;
+ float theta = sg_random() * SGD_2PI;
+ float elev = sg_random() * SGD_PI;
x = width * cos(theta) * 0.5f * sin(elev);
y = width * sin(theta) * 0.5f * sin(elev);
z = height * cos(elev) * 0.5f + height * 0.5f;
// Determine the sprite texture indexes.
int index_x = (int) floor(sg_random() * num_textures_x);
- if (index_x == num_textures_x) { index_x--; }
+ if (index_x >= num_textures_x) { index_x = num_textures_x - 1; }
int index_y = (int) floor(sg_random() * num_textures_y);
// The y index depends on the position of the sprite within the cloud.
// This allows cloud designers to have particular sprites for the base
// and tops of the cloud.
- index_y = (int) floor((z / height + 0.5f) * num_textures_y);
+ index_y = (int) floor((z / height) * num_textures_y);
}
- if (index_y == num_textures_y) { index_y--; }
-
+ if (index_y >= num_textures_y) { index_y = num_textures_y - 1; }
sg->addSprite(SGVec3f(x, y, z),
- index_x,
- index_y,
- sprite_width,
- sprite_height,
- bottom_shade,
- cull_distance_squared,
- height * 0.5f);
+ index_x,
+ index_y,
+ sprite_width,
+ sprite_height,
+ cull_distance_squared);
}
sg->setGeometry(quad);
projects / simgear.git / blobdiff