1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
package de.gamezock.metacraft.ui;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;
import de.gamezock.metacraft.data.Map;
import de.gamezock.metacraft.data.Tile;
public class Renderer {
private Main main;
public Renderer(Main main) {
this.main = main;
}
private void renderTileQuad(GL2 gl, Tile tile, int x, int y) {
float[][] heightmap = tile.getData().getHeightmap();
float[] h = new float[4];
h[0] = heightmap[x][y];
h[1] = heightmap[x+1][y];
h[2] = heightmap[x+1][y+1];
h[3] = heightmap[x][y+1];
float center = (h[0] + h[1] + h[2] + h[3]) / 4;
for(int i = 0; i < 4; ++i) {
int i_1 = (i+1)%4;
int i_2 = (i+2)%4;
Point3f v1 = new Point3f(x + i_1/2, y + i/2, h[i]);
Point3f v2 = new Point3f(x+0.5f, y+0.5f, center);
Point3f v3 = new Point3f(x + i_2/2, y + i_1/2, h[i_1]);
Vector3f edge1 = new Vector3f(), edge2 = new Vector3f();
edge1.sub(v1, v2);
edge2.sub(v3, v2);
Vector3f normal = new Vector3f();
normal.cross(edge1, edge2);
normal.normalize();
gl.glColor3f(1, 1, 1);
gl.glNormal3f(normal.x, normal.y, normal.z);
gl.glVertex3f(v1.x, v1.y, v1.z);
gl.glVertex3f(v2.x, v2.y, v2.z);
gl.glVertex3f(v3.x, v3.y, v3.z);
}
}
private void renderTile(GL2 gl, Tile tile) {
gl.glBegin(GL.GL_TRIANGLES);
for(int i = 0; i < tile.getData().getSize(); ++i) {
for(int j = 0; j < tile.getData().getSize(); ++j) {
renderTileQuad(gl, tile, i, j);
}
}
gl.glEnd();
}
public void render(GL2 gl) {
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
Map currentMap = main.getCurrentMap();
gl.glPushMatrix();
gl.glRotatef((System.currentTimeMillis()%3600)/10.0f, 0, 0, 1);
for(int i = 0; i < currentMap.getWidth(); ++i) {
for(int j = 0; j < currentMap.getHeight(); ++j) {
gl.glPushMatrix();
gl.glTranslatef(i*currentMap.getTileSize(), j*currentMap.getTileSize(), currentMap.getTileHeight(i, j));
renderTile(gl, currentMap.getTile(i, j));
gl.glPopMatrix();
}
}
gl.glPopMatrix();
}
}
|
