SmoothGroundMap::SmoothGroundMap(bounds2f bounds, std::unique_ptr<Image>&& image) :
_heightMap{bounds},
_bounds{bounds},
_image{std::move(image)}
{
UpdateHeightMap();
}
bounds2f SmoothGroundMap::Paint(TerrainFeature feature, glm::vec2 position, float pressure, float radius)
{
glm::vec2 scale = _bounds.size() / glm::vec2(_image->size());
float abs_pressure = glm::abs(pressure);
glm::ivec2 center = ToGroundmapCoordinate(position);
float value = pressure > 0 ? 1 : 0;
float delta = pressure > 0 ? -0.015f : 0.015f;
for (int x = -10; x <= 10; ++x)
for (int y = -10; y <= 10; ++y)
{
glm::ivec2 p = center + glm::ivec2(x, y);
float d = glm::distance(position, scale * glm::vec2(p)) / radius;
float k = 1.0f - d * d;
if (k > 0)
{
glm::vec4 c = _image->GetPixel(p.x, p.y);
switch (feature)
{
case TerrainFeature::Hills:
c.a = glm::mix(c.a, c.a + delta, k * abs_pressure);
break;
case TerrainFeature::Trees:
c.g = glm::mix(c.g, value, k * abs_pressure);
break;
case TerrainFeature::Water:
c.b = glm::mix(c.b, value, k * abs_pressure);
break;
case TerrainFeature::Fords:
c.r = glm::mix(c.r, value, k * abs_pressure);
break;
}
_image->SetPixel(p.x, p.y, c);
}
}
UpdateHeightMap();
return bounds2f(position).add_radius(radius + 1);
}
bounds2f SmoothGroundMap::Paint(TerrainFeature feature, glm::vec2 position, float pressure, const Image& brush)
{
glm::vec2 scale = _bounds.size() / glm::vec2(_image->size());
glm::ivec2 size = brush.size();
glm::ivec2 center = ToGroundmapCoordinate(position);
glm::ivec2 origin = center - size / 2;
float radius = size.x / 2.0f;
for (int x = 0; x < size.x; ++x)
for (int y = 0; y < size.y; ++y)
{
glm::ivec2 p = origin + glm::ivec2(x, y);
float d = glm::distance(position, scale * glm::vec2(p)) / radius;
float k = 1.0f - d * d;
if (k > 0)
{
glm::vec4 b = brush.GetPixel(x, y);
glm::vec4 c = _image->GetPixel(p.x, p.y);
switch (feature)
{
case TerrainFeature::Hills:
c.a = glm::mix(c.a, b.a, k * pressure);
break;
case TerrainFeature::Trees:
c.g = glm::mix(c.g, b.g, k * pressure);
break;
case TerrainFeature::Water:
c.b = glm::mix(c.b, b.b, k * pressure);
break;
case TerrainFeature::Fords:
c.r = glm::mix(c.r, b.r, k * pressure);
break;
}
_image->SetPixel(p.x, p.y, c);
}
}
UpdateHeightMap();
return bounds2f(position).add_radius(radius + 1);
}
void Patch::Init(CSMFGroundDrawer* _drawer, int patchX, int patchZ)
{
coors.x = patchX;
coors.y = patchZ;
smfGroundDrawer = _drawer;
// Store pointer to first byte of the height data for this patch.
heightMap = &(readMap->GetCornerHeightMapUnsynced())[coors.y * mapDims.mapxp1 + coors.x];
// Attach the two m_Base triangles together
baseLeft.BaseNeighbor = &baseRight;
baseRight.BaseNeighbor = &baseLeft;
// Create used OpenGL objects
triList = glGenLists(1);
if (GLEW_ARB_vertex_buffer_object) {
glGenBuffersARB(1, &vertexBuffer);
glGenBuffersARB(1, &vertexIndexBuffer);
}
UpdateHeightMap();
}
void Patch::Init(CSMFGroundDrawer* _drawer, int worldX, int worldZ)
{
smfGroundDrawer = _drawer;
heightData = readmap->GetCornerHeightMapUnsynced();;
m_WorldX = worldX;
m_WorldY = worldZ;
// Attach the two m_Base triangles together
m_BaseLeft.BaseNeighbor = &m_BaseRight;
m_BaseRight.BaseNeighbor = &m_BaseLeft;
// Store pointer to first byte of the height data for this patch.
m_HeightMap = &heightData[worldZ * gs->mapxp1 + worldX];
// Create used OpenGL objects
triList = glGenLists(1);
if (GLEW_ARB_vertex_buffer_object) {
glGenBuffersARB(1, &vertexBuffer);
glGenBuffersARB(1, &vertexIndexBuffer);
}
UpdateHeightMap();
}
