以下のコードを使用して、生成された地形をテクスチャリングする必要があります。
`
private final int SIZE = 17;
float[][] heightmap = new float[SIZE*2][SIZE];
private final int MAX_HEIGHT = 12;
private final float[] MAX_COLOR_HEIGHTS = new float[] {
(float) (MAX_HEIGHT/5.0 * 1.0),
(float) (MAX_HEIGHT/5.0 * 2.0),
(float) (MAX_HEIGHT/5.0 * 3.0),
(float) (MAX_HEIGHT/5.0 * 4.0),
(float) (MAX_HEIGHT/5.0 * 5.0)
};
float[][] noisemap = new float[SIZE*2][SIZE];
private int TerrainNumVertices = (SIZE*2-2)*(SIZE-2)*6*2;
Point4 TerrainPoints[] = new Point4[TerrainNumVertices];
Color4 TerrainColors[] = new Color4[TerrainNumVertices];
Point2 TerrainTex[] = new Point2[TerrainNumVertices];
FloatBuffer TerrainColorsBuf;
FloatBuffer TerrainPointsBuf;
FloatBuffer TerrainTexBuf;
IntBuffer indicesBuf;
private void buildMesh() {
int index = 0;
float height = 0.0f;
for (int z = 0; z < SIZE*2 - 2; z++) {
for (int x = 0; x < SIZE - 2; x++) {
////////////
//TOP line
height = heightmap[z+1][x+0];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+0, height, z+1, 1.0f);
height = heightmap[z+1][x+1];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+1, height, z+1, 1.0f);
//RIGHT line
height = heightmap[z+0][x+1];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+1, height, z+0, 1.0f);
height = heightmap[z+1][x+1];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+1, height, z+1, 1.0f);
//diagonal
height = heightmap[z+1][x+0];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+0, height, z+1, 1.0f);
height = heightmap[z+0][x+1];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+1, height, z+0, 1.0f);
////////////
//bottom line
height = heightmap[z+0][x+0];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+0, height, z+0, 1.0f);
height = heightmap[z+0][x+1];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+1, height, z+0, 1.0f);
//left line
height = heightmap[z+0][x+0];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+0, height, z+0, 1.0f);
height = heightmap[z+1][x+0];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+0, height, z+1, 1.0f);
//diagonal
height = heightmap[z+1][x+0];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+0, height, z+1, 1.0f);
height = heightmap[z+0][x+1];
TerrainColors[index] = colorForHeight(height);
TerrainPoints[index++] = new Point4(x+1, height, z+0, 1.0f);
}
}
TerrainPointsBuf = VectorMath.toBuffer(TerrainPoints);
TerrainColorsBuf = VectorMath.toBuffer(TerrainColors);
}
private Color4 colorForHeight(float height) {
Color4 color;
if (height < MAX_COLOR_HEIGHTS[0]) {
color = new Color4(0.0f, 0.0f, 0.580392157f, 1.0f); // deep sea
} else if (height >= MAX_COLOR_HEIGHTS[0] && height < MAX_COLOR_HEIGHTS[1]) {
color = new Color4(0.0f, 0.580392157f, 1.0f, 1.0f); // sea
} else if (height >= MAX_COLOR_HEIGHTS[1] && height < MAX_COLOR_HEIGHTS[2]) {
color = new Color4(0.0f, 0.580392157f, 0.0f, 1.0f); // green
} else if (height >= MAX_COLOR_HEIGHTS[2] && height < MAX_COLOR_HEIGHTS[3]) {
color = new Color4(0.870588235f, 0.796078431f, 0.470588235f, 1.0f); // heights
} else {
color = new Color4(1.0f, 1.0f, 1.0f, 1.0f); // snow
}
return color;
}
private void perlinNoise() {
//clear heightmap
for (int z=0; z<SIZE*2; z++) {
for (int x=0; x<SIZE; x++) {
heightmap[z][x] = 0f;
}
}
//start of Perlin Noise
int iterations = (int)Math.round(Math.log(SIZE)/Math.log(2));
int tile = 0;
for (int k = 0; k<iterations; k++) {
tile = SIZE/(int)(Math.pow(2, k));
//insert noise with wavelength 'tile' and amplitude MAX_HEIGHT/Math.pow(2, k)
for (int z=0; z<SIZE*2; z+=tile) {
for (int x=0; x<SIZE; x+=tile) {
if (x == 0) {
noisemap[z][x] = 0.0f;
} else {
noisemap[z][x] = (float)(Math.random()*MAX_HEIGHT/Math.pow(2, k));
}
}
}
//interpolate values between the random points
for (int z=0; z<SIZE*2-tile; z+=tile) {
for (int x=0; x<SIZE-tile; x+=tile) {
/* bilinear interpolation */
for (int i=0; i<tile; i++) {
for (int j=0; j<tile; j++) {
float dx = (float)j/(float)tile;
float dz = (float)i/(float)tile;
heightmap[z+i][x+j] += noisemap[z][x]*(1-dx)*(1-dz) +
noisemap[z][x+tile]*(dx)*(1-dz) +
noisemap[z+tile][x]*(1-dx)*(dz) +
noisemap[z+tile][x+tile]*(dx)*(dz);
}
}
}
}
}
}
構文については大変申し訳ありませんが、講師が提供するフレームワークを使用する必要があります。問題は、TILE 1三角形ごとにしか描画されないため、適切にテクスチャを作成する方法がわからないことです(下の左の線は表示されたくないため、理由がわかりません)。