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Added camera and introduced lighting.

This commit is contained in:
Andrew Lalis 2022-07-04 10:18:21 +02:00
parent 26881c1520
commit c541e4e054
8 changed files with 243 additions and 86 deletions
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21
client/src/main/java/nl/andrewl/aos2_client/Aos2Client.java
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@ -13,12 +13,13 @@ import org.lwjgl.opengl.GLUtil;
import org.lwjgl.system.MemoryUtil;
import java.io.IOException;
import java.util.Random;
import static org.lwjgl.glfw.GLFW.*;
import static org.lwjgl.opengl.GL46.*;
public class Aos2Client {
public static void main(String[] args) throws IOException {
public static void main(String[] args) throws IOException, InterruptedException {
System.out.println("LWJGL Version: " + Version.getVersion());
GLFWErrorCallback.createPrint(System.err).set();
if (!glfwInit()) throw new IllegalStateException("Could not initialize GLFW");
@ -34,7 +35,7 @@ public class Aos2Client {
}
});
glfwSetInputMode(windowHandle, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// glfwSetInputMode(windowHandle, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
glfwSetInputMode(windowHandle, GLFW_RAW_MOUSE_MOTION, GLFW_TRUE);
glfwSetWindowPos(windowHandle, 50, 50);
@ -51,10 +52,15 @@ public class Aos2Client {
glEnable(GL_DEPTH_TEST);
glCullFace(GL_BACK);
Chunk chunk = Chunk.of((byte) 64);
Chunk chunk = Chunk.random(new Random(1));
Camera cam = new Camera();
cam.setPosition(0, 3, 0);
float angle = 0;
chunk.setBlockAt(0, 15, 0, (byte) 0);
chunk.setBlockAt(1, 15, 0, (byte) 0);
chunk.setBlockAt(2, 15, 0, (byte) 0);
chunk.setBlockAt(2, 15, 1, (byte) 0);
Matrix4f projectionTransform = new Matrix4f().perspective(70, 800 / 600.0f, 0.01f, 100.0f);
Matrix4f viewTransform = new Matrix4f()
.lookAt(new Vector3f(-5, 50, -10), new Vector3f(8, 0, 8), new Vector3f(0, 1, 0));
ChunkMesh mesh = new ChunkMesh(chunk);
int shaderProgram = createShaderProgram();
@ -66,12 +72,15 @@ public class Aos2Client {
while (!glfwWindowShouldClose(windowHandle)) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUniformMatrix4fv(viewTransformUniform, false, viewTransform.get(new float[16]));
glUniformMatrix4fv(viewTransformUniform, false, cam.getViewTransformData());
mesh.draw();
glfwSwapBuffers(windowHandle);
glfwPollEvents();
angle += Math.PI / 48;
Thread.sleep(40);
cam.setOrientation((float) (Math.PI), 0);
}
Callbacks.glfwFreeCallbacks(windowHandle);

9
client/src/main/java/nl/andrewl/aos2_client/BlockVertexData.java Normal file
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@ -0,0 +1,9 @@
package nl.andrewl.aos2_client;
import org.joml.Vector3f;
public record BlockVertexData(
Vector3f position,
Vector3f color,
Vector3f normal
) {}

41
client/src/main/java/nl/andrewl/aos2_client/Camera.java Normal file
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@ -0,0 +1,41 @@
package nl.andrewl.aos2_client;
import nl.andrewl.aos_core.MathUtils;
import org.joml.Matrix4f;
import org.joml.Vector2f;
import org.joml.Vector3f;
public class Camera {
private final Vector3f position;
private final Vector2f orientation;
private final Matrix4f viewTransform;
private final float[] viewTransformData = new float[16];
public Camera() {
this.position = new Vector3f();
this.orientation = new Vector2f();
this.viewTransform = new Matrix4f();
}
public float[] getViewTransformData() {
return viewTransformData;
}
public void setPosition(float x, float y, float z) {
position.set(x, y, z);
updateViewTransform();
}
public void setOrientation(float x, float y) {
orientation.set(MathUtils.normalize(x, 0, Math.PI * 2), MathUtils.normalize(y, 0, Math.PI * 2));
updateViewTransform();
}
private void updateViewTransform() {
viewTransform.identity();
viewTransform.rotate(-orientation.x, new Vector3f(1, 0, 0));
viewTransform.rotate(-orientation.y, new Vector3f(0, 1, 0));
viewTransform.translate(position.x, position.y, position.z);
viewTransform.get(viewTransformData);
}
}

143
client/src/main/java/nl/andrewl/aos2_client/ChunkMesh.java
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@ -1,10 +1,12 @@
package nl.andrewl.aos2_client;
import nl.andrewl.aos_core.Pair;
import nl.andrewl.aos_core.model.Chunk;
import org.lwjgl.BufferUtils;
import org.joml.Vector3f;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Stream;
import static org.lwjgl.opengl.GL46.*;
@ -20,31 +22,130 @@ public class ChunkMesh {
this.vaoId = glGenVertexArrays();
this.eboId = glGenBuffers();
var meshData = chunk.generateMesh();
System.out.println(meshData.first().size());
FloatBuffer vertexBuffer = BufferUtils.createFloatBuffer(3 * meshData.first().size());
for (var vertex : meshData.first()) {
vertexBuffer.put(vertex.x);
vertexBuffer.put(vertex.y);
vertexBuffer.put(vertex.z);
}
vertexBuffer.flip();
IntBuffer indexBuffer = BufferUtils.createIntBuffer(meshData.second().size());
for (var index : meshData.second()) {
indexBuffer.put(index);
}
indexBuffer.flip();
this.indiciesCount = meshData.second().size();
long start = System.currentTimeMillis();
var meshData = generateMesh(chunk);
long dur = System.currentTimeMillis() - start;
System.out.println("Generated chunk mesh in " + dur + " ms");
this.indiciesCount = meshData.second().length;
glBindBuffer(GL_ARRAY_BUFFER, vboId);
glBufferData(GL_ARRAY_BUFFER, vertexBuffer, GL_STATIC_DRAW);
glBufferData(GL_ARRAY_BUFFER, meshData.first(), GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, eboId);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexBuffer, GL_STATIC_DRAW);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, meshData.second(), GL_STATIC_DRAW);
glBindVertexArray(vaoId);
// Vertex position floats.
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, false, 3 * Float.BYTES, 0);
glVertexAttribPointer(0, 3, GL_FLOAT, false, 9 * Float.BYTES, 0);
// Vertex color floats.
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 3, GL_FLOAT, false, 9 * Float.BYTES, 3 * Float.BYTES);
// Vertex normal floats.
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 3, GL_FLOAT, false, 9 * Float.BYTES, 6 * Float.BYTES);
}
private Pair<float[], int[]> generateMesh(Chunk c) {
List<BlockVertexData> vertexList = new ArrayList<>();
List<Integer> indexList = new ArrayList<>();
int idx = 0;
for (int x = 0; x < Chunk.SIZE; x++) {
for (int y = 0; y < Chunk.SIZE; y++) {
for (int z = 0; z < Chunk.SIZE; z++) {
byte block = c.getBlockAt(x, y, z);
if (block == 0) continue;
Vector3f color = Chunk.getColor(block);
var A = new Vector3f(x, y + 1, z);
var B = new Vector3f(x, y + 1, z + 1);
var C = new Vector3f(x + 1, y + 1, z + 1);
var D = new Vector3f(x + 1, y + 1, z);
var E = new Vector3f(x, y, z);
var F = new Vector3f(x, y, z + 1);
var G = new Vector3f(x + 1, y, z + 1);
var H = new Vector3f(x + 1, y, z);
// Top
if (c.getBlockAt(x, y + 1, z) == 0) {
var norm = new Vector3f(0, 1, 0);
vertexList.addAll(Stream.of(A, B, C, D).map(v -> new BlockVertexData(v, color, norm)).toList());
indexList.addAll(List.of(
idx, idx + 1, idx + 3,
idx + 3, idx + 1, idx + 2
));
idx += 4;
}
// Bottom
if (c.getBlockAt(x, y - 1, z) == 0) {
var norm = new Vector3f(0, -1, 0);
vertexList.addAll(Stream.of(E, F, G, H).map(v -> new BlockVertexData(v, color, norm)).toList());
indexList.addAll(List.of(
idx + 3, idx + 1, idx,
idx + 1, idx + 3, idx + 2
));
idx += 4;
}
// Positive z
if (c.getBlockAt(x, y, z + 1) == 0) {
var norm = new Vector3f(0, 0, 1);
vertexList.addAll(Stream.of(B, F, G, C).map(v -> new BlockVertexData(v, color, norm)).toList());
indexList.addAll(List.of(
idx + 3, idx, idx + 1,
idx + 3, idx + 1, idx + 2
));
idx += 4;
}
// Negative z
if (c.getBlockAt(x, y, z - 1) == 0) {
var norm = new Vector3f(0, 0, -1);
vertexList.addAll(Stream.of(A, E, H, D).map(v -> new BlockVertexData(v, color, norm)).toList());
indexList.addAll(List.of(
idx, idx + 3, idx + 2,
idx + 2, idx + 1, idx
));
idx += 4;
}
// Positive x
if (c.getBlockAt(x + 1, y, z) == 0) {
var norm = new Vector3f(1, 0, 0);
vertexList.addAll(Stream.of(C, G, H, D).map(v -> new BlockVertexData(v, color, norm)).toList());
indexList.addAll(List.of(
idx + 3, idx, idx + 1,
idx + 3, idx + 1, idx + 2
));
idx += 4;
}
// Negative x
if (c.getBlockAt(x - 1, y, z) == 0) {
var norm = new Vector3f(-1, 0, 0);
vertexList.addAll(Stream.of(A, E, F, B).map(v -> new BlockVertexData(v, color, norm)).toList());
indexList.addAll(List.of(
idx + 3, idx, idx + 1,
idx + 3, idx + 1, idx + 2
));
idx += 4;
}
}
}
}
float[] vertexData = new float[9 * vertexList.size()];
int vertexDataIdx = 0;
for (var vertex : vertexList) {
vertexData[vertexDataIdx++] = vertex.position().x;
vertexData[vertexDataIdx++] = vertex.position().y;
vertexData[vertexDataIdx++] = vertex.position().z;
vertexData[vertexDataIdx++] = vertex.color().x;
vertexData[vertexDataIdx++] = vertex.color().y;
vertexData[vertexDataIdx++] = vertex.color().z;
vertexData[vertexDataIdx++] = vertex.normal().x;
vertexData[vertexDataIdx++] = vertex.normal().y;
vertexData[vertexDataIdx++] = vertex.normal().z;
}
int[] indexData = indexList.stream().mapToInt(v -> v).toArray();
System.out.printf("Generated chunk mesh: %d vertices, %d indexes%n", vertexList.size(), indexData.length);
return new Pair<>(vertexData, indexData);
}
public void draw() {

11
client/src/main/resources/shader/fragment.glsl
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@ -2,9 +2,18 @@
in vec3 vertexPosition;
in vec3 vertexColor;
in vec3 vertexNormal;
out vec4 fragmentColor;
void main() {
fragmentColor = vec4(vertexColor, 1.0);
vec3 lightDirection = vec3(0.0, -1.0, -0.5);// TODO: Add this via a uniform.
vec3 lightColor = vec3(1.0, 1.0, 0.9); // TODO: Add this via a uniform.
vec3 ambientComponent = vec3(0.1, 0.1, 0.1);
vec3 diffuseComponent = max(dot(vertexNormal, lightDirection), 0.0) * lightColor;
// No specular component.
fragmentColor = vec4((ambientComponent + diffuseComponent) * vertexColor, 1.0);
//fragmentColor = vec4((vertexNormal + 1) / 2.0, 1.0);
}

7
client/src/main/resources/shader/vertex.glsl
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@ -1,15 +1,20 @@
#version 460 core
layout (location = 0) in vec3 vertexPositionIn;
layout (location = 1) in vec3 vertexColorIn;
layout (location = 2) in vec3 vertexNormalIn;
uniform mat4 projectionTransform;
uniform mat4 viewTransform;
out vec3 vertexPosition;
out vec3 vertexColor;
out vec3 vertexNormal;
void main() {
// TODO: Add model transform uniform.
gl_Position = projectionTransform * viewTransform * vec4(vertexPositionIn, 1.0);
vertexPosition = vertexPositionIn;
vertexColor = vec3(1.0, 0.5, 0.5);
vertexColor = vertexColorIn;
vertexNormal = vertexNormalIn;
}

9
core/src/main/java/nl/andrewl/aos_core/MathUtils.java Normal file
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@ -0,0 +1,9 @@
package nl.andrewl.aos_core;
public class MathUtils {
public static double normalize(double value, double start, double end) {
final double width = end - start;
final double offsetValue = value - start;
return offsetValue - (Math.floor(offsetValue / width) * width) + start;
}
}

88
core/src/main/java/nl/andrewl/aos_core/model/Chunk.java
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@ -1,87 +1,53 @@
package nl.andrewl.aos_core.model;
import nl.andrewl.aos_core.Pair;
import org.joml.Vector3f;
import org.joml.Vector3i;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;
public class Chunk {
/**
* The size of a chunk, in terms of the number of blocks on one axis of the cube.
*/
public static final byte SIZE = 16;
public static final int SIZE = 16;
public static final int TOTAL_SIZE = SIZE * SIZE * SIZE;
private final byte[] blocks = new byte[SIZE * SIZE * SIZE];
private final byte[] blocks = new byte[TOTAL_SIZE];
public byte getBlockAt(int x, int y, int z) {
if (x < 0 || x >= SIZE || y < 0 || y >= SIZE || z < 0 || z >= SIZE) return 0;
int idx = x * SIZE * SIZE + y * SIZE + z;
if (idx < 0 || idx >= SIZE * SIZE * SIZE) return 0;
return blocks[x * SIZE * SIZE + y * SIZE + z];
return blocks[idx];
}
public byte getBlockAt(Vector3i localPosition) {
return getBlockAt(localPosition.x, localPosition.y, localPosition.z);
}
public void setBlockAt(int x, int y, int z, byte value) {
if (x < 0 || x >= SIZE || y < 0 || y >= SIZE || z < 0 || z >= SIZE) return;
int idx = x * SIZE * SIZE + y * SIZE + z;
blocks[idx] = value;
}
public byte[] getBlocks() {
return blocks;
}
public Pair<List<Vector3f>, List<Integer>> generateMesh() {
List<Vector3f> vertexList = new ArrayList<>();
List<Integer> indexList = new ArrayList<>();
int elementIdx = 0;
for (int x = 0; x < SIZE; x++) {
for (int y = 0; y < SIZE; y++) {
for (int z = 0; z < SIZE; z++) {
byte block = getBlockAt(x, y, z);
if (block == 0) continue;
// Top
if (getBlockAt(x, y + 1, z) == 0) {
vertexList.add(new Vector3f(x + 1, y, z)); // 0
vertexList.add(new Vector3f(x, y, z)); // 1
vertexList.add(new Vector3f(x, y, z + 1)); // 2
vertexList.add(new Vector3f(x + 1, y, z + 1));// 3
indexList.add(elementIdx);
indexList.add(elementIdx + 1);
indexList.add(elementIdx + 2);
indexList.add(elementIdx + 2);
indexList.add(elementIdx + 3);
indexList.add(elementIdx);
elementIdx += 4;
}
// Bottom
if (getBlockAt(x, y - 1, z) == 0) {
vertexList.add(new Vector3f(x + 1, y - 1, z)); // 0
vertexList.add(new Vector3f(x, y - 1, z)); // 1
vertexList.add(new Vector3f(x, y - 1, z + 1)); // 2
vertexList.add(new Vector3f(x + 1, y - 1, z + 1));// 3
indexList.add(elementIdx);
indexList.add(elementIdx + 2);
indexList.add(elementIdx + 1);
indexList.add(elementIdx);
indexList.add(elementIdx + 3);
indexList.add(elementIdx + 2);
elementIdx += 4;
}
// Positive z
// Negative z
// Positive x
// Negative x
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
for (int y = 0; y < SIZE; y++) {
sb.append("y=").append(y).append('\n');
for (int z = 0; z < SIZE; z++) {
for (int x = 0; x < SIZE; x++) {
sb.append(String.format("%02X ", getBlockAt(x, y, z)));
}
sb.append('\n');
}
}
return new Pair<>(vertexList, indexList);
return sb.toString();
}
public static Chunk of(byte value) {
@ -90,8 +56,16 @@ public class Chunk {
return c;
}
public static Chunk random(Random rand) {
Chunk c = new Chunk();
for (int i = 0; i < TOTAL_SIZE; i++) {
c.blocks[i] = (byte) rand.nextInt(1, 128);
}
return c;
}
public static Vector3f getColor(byte blockValue) {
float v = blockValue / 128.0f;
float v = blockValue / 127.0f;
return new Vector3f(v);
}
}