Java Code Examples for com.badlogic.gdx.graphics.g3d.utils.MeshPartBuilder#VertexInfo

private void setVertex(int index, MeshPartBuilder.VertexInfo info) {
    index *= stride;
    if (posPos >= 0) {
        vertices[index + posPos] = info.position.x;
        vertices[index + posPos + 1] = info.position.y;
        vertices[index + posPos + 2] = info.position.z;
    }
    if (uvPos >= 0) {
        vertices[index + uvPos] = info.uv.x;
        vertices[index + uvPos + 1] = info.uv.y;
    }
    if (norPos >= 0) {
        vertices[index + norPos] = info.normal.x;
        vertices[index + norPos + 1] = info.normal.y;
        vertices[index + norPos + 2] = info.normal.z;
    }
}
 

@Override
public boolean mouseMoved(int screenX, int screenY) {
    if (this.model == null || modelInstance == null) return false;

    final ProjectContext context = getProjectManager().current();

    final Ray ray = getProjectManager().current().currScene.viewport.getPickRay(screenX, screenY);
    if (context.currScene.terrains.size > 0 && modelInstance != null) {
        MeshPartBuilder.VertexInfo vi = TerrainUtils.getRayIntersectionAndUp(context.currScene.terrains, ray);
        if (vi != null) {
            if (shouldRespectTerrainSlope) {
                modelInstance.transform.setToLookAt(DEFAULT_ORIENTATION, vi.normal);
            }
            modelInstance.transform.setTranslation(vi.position);
        }
    } else {
        tempV3.set(getProjectManager().current().currScene.cam.position);
        tempV3.add(ray.direction.nor().scl(200));
        modelInstance.transform.setTranslation(tempV3);
    }

    return false;
}
 

private void buildTriangles() {
	//System.out.printf("chunk: startXZ: %d, %d -- length: %d\n", startX, startZ, length);
	int count = 0;
	MeshPartBuilder.VertexInfo right;
	MeshPartBuilder.VertexInfo down;
	MeshPartBuilder.VertexInfo downRight;
	for (int z = 0; z < vertexInfos.length - 1; z++) {
		for (int x = 0; x < (vertexInfos[0].length - 1); x++) {
			MeshPartBuilder.VertexInfo vert = vertexInfos[z][x];
			right = vertexInfos[z][x+1];
			down = vertexInfos[z+1][x];
			downRight = vertexInfos[z+1][x+1];
			// each z row has two trianagles forming a rect
			int xIdx = x*2;
			Triangle top = new Triangle(z, xIdx, vert, down, right);
			Triangle bottom = new Triangle(z, xIdx+1, downRight, right, down);
			count += 2;
		}
	}
	System.out.println("built " + count + " triangles");
}
 

private void setVertexPositions() {
	// store vertex info for second pass where we calculate vertex normals for per-vertex lighting
	float[][] pts = heightMap.heights;
	float blockSize = heightMap.getWidthScale();
	float heightScale = heightMap.getHeightScale();
	float width = heightMap.getWidthWorld();
	float depth = heightMap.getDepthWorld();
	for (int z = 0; z < pts.length; z++) {
		for (int x = 0; x < pts[z].length; x++) {
			float y = pts[z][x];
			MeshPartBuilder.VertexInfo thisVert = new MeshPartBuilder.VertexInfo();
			thisVert.setPos(x * blockSize, y * heightScale, z * blockSize);
			// set texture UV
			float u = (x * blockSize) / width;
			float v = (z * blockSize) / depth;
			float scl = heightScale;
			scl = 1f;
			thisVert.setUV(u * scl, v * scl);
			vertexInfos[z][x] = thisVert;
		}
	}
}
 

public Triangle(int triZ, int triX, MeshPartBuilder.VertexInfo a, MeshPartBuilder.VertexInfo b, MeshPartBuilder.VertexInfo c) {
	zidx = triZ;
	xidx = triX;
	try {
		tris[triZ][triX] = this;
	} catch (ArrayIndexOutOfBoundsException e) {
		e.printStackTrace();
		Tools.sleep(500);
		System.out.println("tried ZX: " + triZ + ", " + triX);
		System.out.println("length ZX: " + tris.length + ", " + tris[0].length);
		System.exit(5);
	}
	this.a = a;
	this.b = b;
	this.c = c;
	this.calculateFaceNormal();
}
 

@Override
public void renderTop(int atlasIndex, float x1, float z1, float x2, float z2, float y, float lightLevel, PerCornerLightData pcld, MeshBuilder builder) {
    float u = getU(atlasIndex);
    float v = getV(atlasIndex);
    builder.setUVRange(u, v, u, v);

    MeshPartBuilder.VertexInfo c00 = new MeshPartBuilder.VertexInfo().setPos(x1, y, z1).setNor(0, 1, 0);
    MeshPartBuilder.VertexInfo c01 = new MeshPartBuilder.VertexInfo().setPos(x1, y, z2).setNor(0, 1, 0);
    MeshPartBuilder.VertexInfo c10 = new MeshPartBuilder.VertexInfo().setPos(x2, y, z1).setNor(0, 1, 0);
    MeshPartBuilder.VertexInfo c11 = new MeshPartBuilder.VertexInfo().setPos(x2, y, z2).setNor(0, 1, 0);

    IChunk chunk = RadixClient.getInstance().getWorld().getChunk((int) x1, (int) z1);
    Biome biome;
    if(chunk != null) {
        biome = chunk.getBiome();
    } else {
        biome = RadixAPI.instance.getBiomeByID(0);
    }
    int[] color = biome.getGrassColor((int) y - 1);
    float r = color[0]/255f;
    float g = color[1]/255f;
    float b = color[2]/255f;
    if(pcld == null) {
        builder.setColor(r*lightLevel, g*lightLevel, b*lightLevel, 1);
    } else {
        c00.setCol(r*pcld.l00, g*pcld.l00, b*pcld.l00, 1);
        c01.setCol(r*pcld.l01, g*pcld.l01, b*pcld.l01, 1);
        c10.setCol(r*pcld.l10, g*pcld.l10, b*pcld.l10, 1);
        c11.setCol(r*pcld.l11, g*pcld.l11, b*pcld.l11, 1);
    }

    builder.rect(c01, c11, c10, c00);
}
 

private MeshPartBuilder.VertexInfo calculateVertexAt(MeshPartBuilder.VertexInfo out, int x, int z) {
    final float dx = (float) x / (float) (vertexResolution - 1);
    final float dz = (float) z / (float) (vertexResolution - 1);
    final float height = heightData[z * vertexResolution + x];

    out.position.set(dx * this.terrainWidth, height, dz * this.terrainDepth);
    out.uv.set(dx, dz).scl(uvScale);

    return out;
}
 

private void createGround() {
	if (++timesCreated > 1) {
		throw new GdxRuntimeException("can't create heightmap more than one time");
	}
	vertexInfos = new MeshPartBuilder.VertexInfo[heightMap.heights.length][heightMap.heights[0].length];
	int trisHeight = (heightMap.getWidth() - 1);
	int trisWidth = (heightMap.getWidth() - 1) * 2;
	System.out.printf("tris zHeight,xWidth: %d, %d\n", trisHeight, trisWidth);
	tris = new Triangle[trisHeight][trisWidth];
	setVertexPositions(); // iterate through height map points, setting world coordinates
	buildTriangles(); // abstraction of the triangles that create the mesh
	// useful for calculating vertex normals, since each triangle stores a face normal
	// but somewhat wasteful of memory
	// TODO: optimize
	calculateVertexNormals(); // calculate vertex normals for per-vertex lighting
	final int chunkSize = 32;
	int z = 0;
	int zRemain = (int) Math.ceil(heightMap.getDepth() / chunkSize);
	if (zRemain == 0) zRemain = 1;
	int baseXRemain = (int) Math.ceil(heightMap.getWidth() / chunkSize);
	if (baseXRemain == 0) baseXRemain = 1;
	System.out.println("z chunks: " + zRemain + ", x chunks: " + baseXRemain);
	while (zRemain > 0) {
		int xRemain = baseXRemain;
		int x = 0;
		while (xRemain > 0) {
			buildGroundModels(x, z, chunkSize);
			xRemain--;
			x += chunkSize*2;
		}
		zRemain--;
		z += chunkSize;
	}
}
 

private void calculateVertexNormals() {
	int count = 0;
	for (int z = 0; z < vertexInfos.length; z++) {
		for (int x = 0; x < vertexInfos[z].length; x++) {
			MeshPartBuilder.VertexInfo vert = vertexInfos[z][x];
			// calculate normals
			vert.setNor(calculateNormalForVertex(z, x));

		}
	}
	System.out.print("vertex count: " + count + ", ");

}
 

public static String fmt(MeshPartBuilder.VertexInfo vi, String name) {
	if (name == null) name = "";
	StringBuilder sb = new StringBuilder();
	sb.append("VertexInfo: ").append(name).append("\n");
	sb.append("\t").append(fmt(vi.position, "position")).append("\n");
	sb.append("\t").append(fmt(vi.color)).append("\n");
	sb.append("\t").append(fmt(vi.normal, "normal"));
	return sb.toString();
}
 

/**
 * Calculates normal of a vertex at x,y based on the verticesOnZ of the
 * surrounding vertices
 */
private MeshPartBuilder.VertexInfo calculateNormalAt(MeshPartBuilder.VertexInfo out, int x, int y) {
    out.normal.set(getNormalAt(x, y));
    return out;
}
 

public static Model torus(Material mat, float width, float height, int divisionsU, int divisionsV) {

        ModelBuilder modelBuilder = new ModelBuilder();
        modelBuilder.begin();
        MeshPartBuilder builder = modelBuilder.part("torus", GL20.GL_TRIANGLES, VertexAttributes.Usage.Position, mat);
        // builder.setColor(Color.LIGHT_GRAY);

        MeshPartBuilder.VertexInfo curr1 = v0.set(null, null, null, null);
        curr1.hasUV = curr1.hasNormal = false;
        curr1.hasPosition = true;

        MeshPartBuilder.VertexInfo curr2 = v1.set(null, null, null, null);
        curr2.hasUV = curr2.hasNormal = false;
        curr2.hasPosition = true;
        short i1, i2, i3 = 0, i4 = 0;

        int i, j, k;
        double s, t, twopi;
        twopi = 2 * Math.PI;

        for (i = 0; i < divisionsV; i++) {
            for (j = 0; j <= divisionsU; j++) {
                for (k = 1; k >= 0; k--) {
                    s = (i + k) % divisionsV + 0.5;
                    t = j % divisionsU;

                    curr1.position.set(
                            (float) ((width + height * Math.cos(s * twopi / divisionsV))
                                    * Math.cos(t * twopi / divisionsU)),
                            (float) ((width + height * Math.cos(s * twopi / divisionsV))
                                    * Math.sin(t * twopi / divisionsU)),
                            (float) (height * Math.sin(s * twopi / divisionsV)));
                    k--;
                    s = (i + k) % divisionsV + 0.5;
                    curr2.position.set(
                            (float) ((width + height * Math.cos(s * twopi / divisionsV))
                                    * Math.cos(t * twopi / divisionsU)),
                            (float) ((width + height * Math.cos(s * twopi / divisionsV))
                                    * Math.sin(t * twopi / divisionsU)),
                            (float) (height * Math.sin(s * twopi / divisionsV)));
                    // curr2.uv.set((float) s, 0);
                    i1 = builder.vertex(curr1);
                    i2 = builder.vertex(curr2);
                    builder.rect(i4, i2, i1, i3);
                    i4 = i2;
                    i3 = i1;
                }
            }
        }

        return modelBuilder.end();
    }
 

public static String fmt(MeshPartBuilder.VertexInfo vi) {
	return fmt(vi, null);
}
 

public static void print(MeshPartBuilder.VertexInfo vi) {
	System.out.println(fmt(vi, null));
}
 

public static void print(MeshPartBuilder.VertexInfo vi, String name) {
	System.out.println(fmt(vi, name));
}