void init(){
// White color
glClearColor(1.0, 1.0, 1.0, 0.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0.0, windowWidth, windowHeight, 0.0);
// Call random point generator
inputter();
switch(pointMode){
case Spiral:
generateSpiralPoints();
break;
case Random:
generateRandomPoints();
break;
case Grid:
generateGridPoints();
break;
default: break;
}
generateVoronoi();
}
int terrainInput(double elevation[IslandWidth][IslandHeight], Biome biomesInformation[IslandWidth][IslandHeight], double * circleVertices, glm::vec3 circleColor[IslandWidth][IslandHeight], glm::vec3 perlinOffsets[IslandWidth][IslandHeight], Mode pointMode, bool IslandMode){
int waterIdx;
int waterLocCount = 15;
terrain waterLocations[waterLocCount];
for(waterIdx = 0; waterIdx < waterLocCount; waterIdx++){
waterLocations[waterIdx].x = (rand() % (int) IslandWidth) + 1;
// waterLocations[waterIdx].x = 700;
waterLocations[waterIdx].y = (rand() % (int) IslandHeight) + 1;
// waterLocations[waterIdx].y = 600;
waterLocations[waterIdx].waterValue = 1.0f;
}
int circleIdx;
int * circleLocations;
int circlesCt;
double xpos0, xpos1, ypos0, ypos1, r, rmax, myPow;
rmax = 100; // for circles
r = 160;
switch(pointMode){
case Spiral:
circlesCt = 180;
if(IslandMode) circlesCt = 300;
generateSpiralPoints(&circleLocations, circlesCt);
break;
case Random:
circlesCt = 100;
if(IslandMode) circlesCt = 300;
generateRandomPoints(&circleLocations, circlesCt);
break;
case Grid:
circlesCt = 80;
// r = 100;
if(IslandMode) circlesCt = 300;
generateGridPoints(&circleLocations, circlesCt);
break;
default: break;
}
terrain allIntensity[circlesCt];
int heightRand;
int maxHeight = 500;
int i =0;
for(circleIdx = 0; circleIdx < circlesCt; circleIdx++){
// allIntensity[circleIdx].x = (rand() % (int) IslandWidth) + 1;
allIntensity[circleIdx].x = circleLocations[i++];
// allIntensity[circleIdx].y = (rand() % (int) IslandHeight) + 1;
allIntensity[circleIdx].y = circleLocations[i++];
i++;
heightRand = (rand() % maxHeight);
// allIntensity[circleIdx].intensity = 0.2f;
allIntensity[circleIdx].intensity = ((double) heightRand / maxHeight) * 0.4f;
}
double theta = 0;
int vi = 0, coli = 0;
double rrand = (rand() % (int) r);
int x,y;
i = 0;
glm::vec2 center;
glm::vec2 loc;
center.x = IslandWidth /2;
center.y = IslandHeight /2;
double dIslandCtr;
double distFromCenter;
for(x = 0; x < IslandWidth; x++){
for(y = 0; y < IslandHeight; y++){
loc.x = x;
loc.y = y;
dIslandCtr = glm::length(loc -center);
dIslandCtr /= glm::length(center);
for(i = 0; i < circlesCt; i++){
// r = (rand() % (int) (rmax)) + rmax /2;
distFromCenter = sqrt( (double) pow(allIntensity[i].x - x, 2) + (double) pow(allIntensity[i].y - y, 2));
distFromCenter = ((distFromCenter / r) > 1) ? 1.0f : (distFromCenter / r);
// distFromCenter = ((distFromCenter / (r + rrand) ) > 1) ? 1.0f : (distFromCenter / r + rrand);
if(distFromCenter <= 1.000000f){
// the further you are, the less intensity, lower elevation
if((1.0 - distFromCenter) < (1.0 /3.0)){
myPow = 2;
} else if((1.0 - distFromCenter) < (2.0 * 1.0 /3.0)){
myPow = 1;
} else {
myPow = 0.5;
}
if(IslandMode){
elevation[x][y] += allIntensity[i].intensity * pow(1.0 - distFromCenter, myPow) * pow(1.0 - dIslandCtr, 3);
} else{
elevation[x][y] += allIntensity[i].intensity * pow(1.0 - distFromCenter, myPow);
}
}
else {
elevation[x][y] += 0.0f;
}
}
}
}
// Perlin, may or may not be needed
generatePerlinNoise(perlinOffsets, elevation);
biomesGeneration(circleColor, elevation, waterLocations, waterLocCount, biomesInformation, IslandMode);
return IslandWidth * IslandHeight;
}
void generateArrays(int tess) {
generateSpherePoints(tess);
generateTorusPoints(tess);
generateGridPoints(tess);
}