128 lines
2.4 KiB
C#
128 lines
2.4 KiB
C#
using System;
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using System.IO;
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using OpenTK.Graphics.OpenGL4;
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using OpenTK;
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using org.nhengine.graphics;
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namespace nhengine
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{
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public class SquaredMap : GLObject
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{
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private int width,
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height;
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private float[] heightMap;
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public SquaredMap(int width,int height)
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:base( 12 * width * height )
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{
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this.width = width;
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this.height = height;
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this.heightMap = new float[ (width + 1) * (height + 1) ];
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normalsEnabled = true;
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generateHeightMap();
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computeGL();
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updateGL();
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}
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public void generateHeightMap(){
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Random rand = new Random();
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for (int y = 0; y <= height; y++)
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{
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for (int x = 0; x <= width; x++)
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{
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float h = (float)rand.NextDouble();
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heightMap[x + (y * width)] = (float)(256 * (h * h));
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}
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}
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}
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public void computeGL(){
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float left,
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right,
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bottom,
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top,
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vcenter,
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hcenter;
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for (int x = 0; x < width; x++)
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{
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for (int y = 0; y < height; y++)
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{
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int i = x + ((width + 1) * y);
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int j = x + ((width + 1) * (y + 1));
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float[] h = new float[4];
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h[0] = heightMap[i];
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h[1] = heightMap[i+1];
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h[2] = heightMap[j];
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h[3] = heightMap[j+1];
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float ah = (h[0] + h[1] + h[2] + h[3]) / 4.0f;
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left = 128 * x;
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right = 128 * (x + 1);
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bottom = 128 * y;
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top = 128 * (y + 1);
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vcenter = (top + bottom) / 2.0f;
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hcenter = (left + right) / 2.0f;
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int b = 4 * (x + (width * y));
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setTriangle(
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b,
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new Vector3(left, top, h[2]),
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new Vector3(right, top, h[3]),
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new Vector3(hcenter,vcenter,ah)
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);
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setTriangle(
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b + 1,
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new Vector3(right, top, h[3]),
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new Vector3(right, bottom, h[1]),
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new Vector3(hcenter, vcenter, ah)
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);
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setTriangle(
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b + 2,
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new Vector3(right, bottom, h[1]),
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new Vector3(left, bottom, h[0]),
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new Vector3(hcenter, vcenter, ah)
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);
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setTriangle(
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b + 3,
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new Vector3(left, bottom, h[0]),
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new Vector3(left, top, h[2]),
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new Vector3(hcenter, vcenter, ah)
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);
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setColor(new Vector4(1.0f, 1.0f, 0.5f, 1.0f));
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for (int n = 0; n < vertices.Length / 3;n++){
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float _h = vertices[(3 * n) + 2] / 256.0f;
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setColor(
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n,
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new Vector4(
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0.3f + (0.7f * _h),
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0.2f + (0.8f * _h),
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0.4f + (0.6f * _h),
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1.0f
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)
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);
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}
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}
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}
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}
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}
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}
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