float TerrainRenderer::GetBXAround(int x, int y, const unsigned char triangle, const unsigned char dir)
{
GetPointAround(x, y, dir);
int xo;
MapPoint t = ConvertCoords(x, y, &xo, NULL);
return GetBX(t, triangle) + xo;
}
float TerrainRenderer::GetBXAround(int x, int y, const unsigned char triangle, const unsigned char dir)
{
unsigned short tx,ty;
GetPointAround(x,y,dir);
int xo,yo;
ConvertCoords(x,y,tx,ty,&xo,&yo);
return GetBX(tx,ty,triangle)+xo;
}
/// Erzeugt die Dreiecke für die Ränder
void TerrainRenderer::UpdateBorderTrianglePos(const MapCoord x, const MapCoord y,const GameWorldViewer * gwv, const bool update)
{
unsigned int pos = y * width + x;
// Für VBO-Aktualisierung:
// Erzeugte Ränder zählen
unsigned count_borders = 0;
// Erstes Offset merken
unsigned first_offset = 0;
// Rand links - rechts
for(unsigned char i = 0; i < 2; ++i)
{
if(borders[pos].left_right[i])
{
unsigned int offset = borders[pos].left_right_offset[i];
if(!first_offset)
first_offset = offset;
gl_vertices[offset].pos[i ? 0 : 2].x = GetTerrainX(x, y);
gl_vertices[offset].pos[i ? 0 : 2].y = GetTerrainY(x, y);
gl_vertices[offset].pos[1 ].x = GetTerrainXAround(x,y,4);
gl_vertices[offset].pos[1 ].y = GetTerrainYAround(x,y,4);
gl_vertices[offset].pos[i ? 2 : 0].x = GetBX(x, y, i);
gl_vertices[offset].pos[i ? 2 : 0].y = GetBY(x, y, i);
++count_borders;
}
}
// Rand rechts - links
for(unsigned char i = 0; i < 2; ++i)
{
if(borders[pos].right_left[i])
{
unsigned int offset = borders[pos].right_left_offset[i];
if(!first_offset)
first_offset = offset;
gl_vertices[offset].pos[i ? 2 : 0].x = GetTerrainXAround(x,y,4);
gl_vertices[offset].pos[i ? 2 : 0].y = GetTerrainYAround(x,y,4);
gl_vertices[offset].pos[1 ].x = GetTerrainXAround(x,y,3);
gl_vertices[offset].pos[1 ].y = GetTerrainYAround(x,y,3);
if(i == 0)
{
gl_vertices[offset].pos[2].x = GetBX(x, y, 1);
gl_vertices[offset].pos[2].y = GetBY(x, y, 1);
}
else
{
gl_vertices[offset].pos[0].x = GetBXAround(x, y, 0, 3);
gl_vertices[offset].pos[0].y = GetBYAround(x, y, 0, 3);
}
++count_borders;
}
}
// Rand oben - unten
for(unsigned char i = 0; i < 2; ++i)
{
if(borders[pos].top_down[i])
{
unsigned int offset = borders[pos].top_down_offset[i];
if(!first_offset)
first_offset = offset;
gl_vertices[offset].pos[i ? 2 : 0].x = GetTerrainXAround(x,y,5);
gl_vertices[offset].pos[i ? 2 : 0].y = GetTerrainYAround(x,y,5);
gl_vertices[offset].pos[1 ].x = GetTerrainXAround(x,y,4);
gl_vertices[offset].pos[1 ].y = GetTerrainYAround(x,y,4);
if(i == 0)
{
gl_vertices[offset].pos[2].x = GetBX(x,y,i);
gl_vertices[offset].pos[2].y = GetBY(x,y,i);
}
else
{
//x - i + i * rt, y + i, i
gl_vertices[offset].pos[0].x = GetBXAround(x, y, i, 5);
gl_vertices[offset].pos[0].y = GetBYAround(x, y, i, 5);
}
++count_borders;
}
}
/// Bei Vertexbuffern das die Daten aktualisieren
if(update && SETTINGS.video.vbo)
{
glBindBufferARB(GL_ARRAY_BUFFER_ARB, vbo_vertices);
glBufferSubDataARB(GL_ARRAY_BUFFER_ARB,first_offset * 3 * 2 * sizeof(float),
count_borders * 3 * 2 * sizeof(float), &gl_vertices[first_offset]);
}
}
