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voxeltronik/src/chunkrenderer.cpp

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/*
* =====================================================================================
*
* Filename: chunkrenderer.cpp
*
* Description:
*
* Version: 1.0
* Created: 04/04/2014 11:34:53 PM
* Revision: none
* Compiler: gcc
*
* Author: YOUR NAME (),
* Organization:
*
* =====================================================================================
*/
#include "chunkrenderer.h"
#include "chunk.h"
#include "world.h"
#include <GL/glew.h>
#include <GL/gl.h>
#include <iostream>
namespace vtk {
void ChunkRenderer::init() {
hasGeometryChanged = false;
hasTexturesChanged = false;
hasLightingChanged = false;
updatingGeometry = false;
chunkSize = 16;
lightingMethod = 0;
voxelSize = 1.0f;
//generate VBOs
for (auto& i : vertexBuffers) {
for(auto& j : i) {
glGenBuffers(1, &j);
}
}
//generate VAOs
for (auto& i : vertexArrays) {
glGenVertexArrays(1, &i);
}
//bind VAOs
for (int i = 0; i < 6; i++) {
glBindVertexArray(vertexArrays[i]);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffers[i][0]);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffers[i][1]);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray(1);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffers[i][2]);
glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray(2);
}
}
void ChunkRenderer::drawChunk() {
for (int i = 0; i < 6; i++) {
glBindVertexArray(vertexArrays[i]);
glDrawArrays(GL_TRIANGLES, 0, vertexCounts[i]);
}
}
void ChunkRenderer::setChunkPosition(const int&x, const int& y, const int&z) {
chunkPos = std::make_tuple(x, y, z);
}
void ChunkRenderer::updateGeometry() {
updatingGeometry = true;
for (auto& i : geometryVertices)
i.clear();
for (auto& i : faceCounts)
i = 0;
for (unsigned i = 0; i < chunkSize; i++) {
for (unsigned j = 0; j < chunkSize; j++) {
for (unsigned k = 0; k < chunkSize; k++) {
if (linkedChunk->isVoxelSolid(i,j,k)) {
if (!linkedChunk->isVoxelSolid(i+1,j,k)) {
//right face
//top left
addVertex(geometryVertices[0], i * voxelSize + voxelSize, j * voxelSize + voxelSize, k * voxelSize + voxelSize);
//top right
addVertex(geometryVertices[0], i * voxelSize + voxelSize, j * voxelSize + voxelSize, k * voxelSize);
//bottom left
addVertex(geometryVertices[0], i * voxelSize + voxelSize, j * voxelSize, k * voxelSize + voxelSize);
//bottom right
addVertex(geometryVertices[0], i * voxelSize + voxelSize, j * voxelSize, k * voxelSize);
//bottom left
addVertex(geometryVertices[0], i * voxelSize + voxelSize, j * voxelSize, k * voxelSize + voxelSize);
//top right
addVertex(geometryVertices[0], i * voxelSize + voxelSize, j * voxelSize + voxelSize, k * voxelSize);
faceCounts[0]++;
}
if (!linkedChunk->isVoxelSolid(i-1,j,k)) {
//left face
//top left
addVertex(geometryVertices[1], i * voxelSize, j * voxelSize + voxelSize, k * voxelSize);
//top right
addVertex(geometryVertices[1], i * voxelSize, j * voxelSize + voxelSize, k * voxelSize + voxelSize);
//bottom left
addVertex(geometryVertices[1], i * voxelSize, j * voxelSize, k * voxelSize);
//bottom right
addVertex(geometryVertices[1], i * voxelSize, j * voxelSize, k * voxelSize + voxelSize);
//bottom left
addVertex(geometryVertices[1], i * voxelSize, j * voxelSize, k * voxelSize);
//top right
addVertex(geometryVertices[1], i * voxelSize, j * voxelSize + voxelSize, k * voxelSize + voxelSize);
faceCounts[1]++;
}
if (!linkedChunk->isVoxelSolid(i,j+1,k)) {
//top face
//bottom left
addVertex(geometryVertices[2], i * voxelSize, j * voxelSize + voxelSize, k * voxelSize + voxelSize);
//top left
addVertex(geometryVertices[2], i * voxelSize, j * voxelSize + voxelSize, k * voxelSize);
//bottom right
addVertex(geometryVertices[2], i * voxelSize + voxelSize, j * voxelSize + voxelSize, k * voxelSize + voxelSize);
//top right
addVertex(geometryVertices[2], i * voxelSize + voxelSize, j * voxelSize + voxelSize, k * voxelSize);
//bottom right
addVertex(geometryVertices[2], i * voxelSize + voxelSize, j * voxelSize + voxelSize, k * voxelSize + voxelSize);
//top left
addVertex(geometryVertices[2], i * voxelSize, j * voxelSize + voxelSize, k * voxelSize);
faceCounts[2]++;
}
if (!linkedChunk->isVoxelSolid(i,j-1,k)) {
//bottom face
//top right
addVertex(geometryVertices[3], i * voxelSize + voxelSize, j * voxelSize, k * voxelSize + voxelSize);
//bottom right
addVertex(geometryVertices[3], i * voxelSize + voxelSize, j * voxelSize, k * voxelSize);
//top left
addVertex(geometryVertices[3], i * voxelSize, j * voxelSize, k * voxelSize + voxelSize);
//bottom left
addVertex(geometryVertices[3], i * voxelSize, j * voxelSize, k * voxelSize);
//top left
addVertex(geometryVertices[3], i * voxelSize, j * voxelSize, k * voxelSize + voxelSize);
//bottom right
addVertex(geometryVertices[3], i * voxelSize + voxelSize, j * voxelSize, k * voxelSize);
faceCounts[3]++;
}
if (!linkedChunk->isVoxelSolid(i,j,k-1)) {
//back face
//top left
addVertex(geometryVertices[4], i * voxelSize + voxelSize, j * voxelSize + voxelSize, k * voxelSize);
//top right
addVertex(geometryVertices[4], i * voxelSize, j * voxelSize + voxelSize, k * voxelSize);
//bottom left
addVertex(geometryVertices[4], i * voxelSize + voxelSize, j * voxelSize, k * voxelSize);
//bottom right
addVertex(geometryVertices[4], i * voxelSize, j * voxelSize, k * voxelSize);
//bottom left
addVertex(geometryVertices[4], i * voxelSize + voxelSize, j * voxelSize, k * voxelSize);
//top right
addVertex(geometryVertices[4], i * voxelSize, j * voxelSize + voxelSize, k * voxelSize);
faceCounts[4]++;
}
if (!linkedChunk->isVoxelSolid(i,j,k+1)) {
//front face
//bottom right
addVertex(geometryVertices[5], i * voxelSize + voxelSize, j * voxelSize, k * voxelSize + voxelSize);
//bottom left
addVertex(geometryVertices[5], i * voxelSize, j * voxelSize, k * voxelSize + voxelSize);
//top right
addVertex(geometryVertices[5], i * voxelSize + voxelSize, j * voxelSize + voxelSize, k * voxelSize + voxelSize);
//top left
addVertex(geometryVertices[5], i * voxelSize, j * voxelSize + voxelSize, k * voxelSize + voxelSize);
//top right
addVertex(geometryVertices[5], i * voxelSize + voxelSize, j * voxelSize + voxelSize, k * voxelSize + voxelSize);
//bottom left
addVertex(geometryVertices[5], i * voxelSize, j * voxelSize, k * voxelSize + voxelSize);
faceCounts[5]++;
}
}
}
}
}
hasGeometryChanged = true;
updateTexCoords();
updateLighting();
updatingGeometry = false;
}
void ChunkRenderer::updateTexCoords() {
auto linkedWorld = linkedChunk->getWorld();
for (auto& i : textureCoords)
i.clear();
for (unsigned i = 0; i < chunkSize; i++) {
for (unsigned j = 0; j < chunkSize; j++) {
for (unsigned k = 0; k < chunkSize; k++) {
if (linkedChunk->isVoxelSolid(i,j,k)) {
if (!linkedChunk->isVoxelSolid(i+1,j,k)) {
//right face
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[0], linkedChunk->getWorldCoords(i,j,k), Face3D::RIGHT, Corner2D::TOPLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[0], linkedChunk->getWorldCoords(i,j,k), Face3D::RIGHT, Corner2D::TOPRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[0], linkedChunk->getWorldCoords(i,j,k), Face3D::RIGHT, Corner2D::BOTTOMLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[0], linkedChunk->getWorldCoords(i,j,k), Face3D::RIGHT, Corner2D::BOTTOMRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[0], linkedChunk->getWorldCoords(i,j,k), Face3D::RIGHT, Corner2D::BOTTOMLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[0], linkedChunk->getWorldCoords(i,j,k), Face3D::RIGHT, Corner2D::TOPRIGHT);
}
if (!linkedChunk->isVoxelSolid(i-1,j,k)) {
//left face
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[1], linkedChunk->getWorldCoords(i,j,k), Face3D::LEFT, Corner2D::TOPLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[1], linkedChunk->getWorldCoords(i,j,k), Face3D::LEFT, Corner2D::TOPRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[1], linkedChunk->getWorldCoords(i,j,k), Face3D::LEFT, Corner2D::BOTTOMLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[1], linkedChunk->getWorldCoords(i,j,k), Face3D::LEFT, Corner2D::BOTTOMRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[1], linkedChunk->getWorldCoords(i,j,k), Face3D::LEFT, Corner2D::BOTTOMLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[1], linkedChunk->getWorldCoords(i,j,k), Face3D::LEFT, Corner2D::TOPRIGHT);
}
if (!linkedChunk->isVoxelSolid(i,j+1,k)) {
//top face
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[2], linkedChunk->getWorldCoords(i,j,k), Face3D::TOP, Corner2D::BOTTOMLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[2], linkedChunk->getWorldCoords(i,j,k), Face3D::TOP, Corner2D::TOPLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[2], linkedChunk->getWorldCoords(i,j,k), Face3D::TOP, Corner2D::BOTTOMRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[2], linkedChunk->getWorldCoords(i,j,k), Face3D::TOP, Corner2D::TOPRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[2], linkedChunk->getWorldCoords(i,j,k), Face3D::TOP, Corner2D::BOTTOMRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[2], linkedChunk->getWorldCoords(i,j,k), Face3D::TOP, Corner2D::TOPLEFT);
}
if (!linkedChunk->isVoxelSolid(i,j-1,k)) {
//bottom face
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[3], linkedChunk->getWorldCoords(i,j,k), Face3D::BOTTOM, Corner2D::TOPRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[3], linkedChunk->getWorldCoords(i,j,k), Face3D::BOTTOM, Corner2D::BOTTOMRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[3], linkedChunk->getWorldCoords(i,j,k), Face3D::BOTTOM, Corner2D::TOPLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[3], linkedChunk->getWorldCoords(i,j,k), Face3D::BOTTOM, Corner2D::BOTTOMLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[3], linkedChunk->getWorldCoords(i,j,k), Face3D::BOTTOM, Corner2D::TOPLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[3], linkedChunk->getWorldCoords(i,j,k), Face3D::BOTTOM, Corner2D::BOTTOMRIGHT);
}
if (!linkedChunk->isVoxelSolid(i,j,k-1)) {
//back face
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[4], linkedChunk->getWorldCoords(i,j,k), Face3D::BACK, Corner2D::TOPLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[4], linkedChunk->getWorldCoords(i,j,k), Face3D::BACK, Corner2D::TOPRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[4], linkedChunk->getWorldCoords(i,j,k), Face3D::BACK, Corner2D::BOTTOMLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[4], linkedChunk->getWorldCoords(i,j,k), Face3D::BACK, Corner2D::BOTTOMRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[4], linkedChunk->getWorldCoords(i,j,k), Face3D::BACK, Corner2D::BOTTOMLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[4], linkedChunk->getWorldCoords(i,j,k), Face3D::BACK, Corner2D::TOPRIGHT);
}
if (!linkedChunk->isVoxelSolid(i,j,k+1)) {
//front face
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[5], linkedChunk->getWorldCoords(i,j,k), Face3D::FRONT, Corner2D::BOTTOMRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[5], linkedChunk->getWorldCoords(i,j,k), Face3D::FRONT, Corner2D::BOTTOMLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[5], linkedChunk->getWorldCoords(i,j,k), Face3D::FRONT, Corner2D::TOPRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[5], linkedChunk->getWorldCoords(i,j,k), Face3D::FRONT, Corner2D::TOPLEFT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[5], linkedChunk->getWorldCoords(i,j,k), Face3D::FRONT, Corner2D::TOPRIGHT);
linkedWorld.voxelInfo.pushTexCoordFromWorldCoords(textureCoords[5], linkedChunk->getWorldCoords(i,j,k), Face3D::FRONT, Corner2D::BOTTOMLEFT);
}
}
}
}
}
hasTexturesChanged = true;
}
void ChunkRenderer::updateLighting() {
for (auto& i : lightingData)
i.clear();
for (unsigned i = 0; i < chunkSize; i++) {
for (unsigned j = 0; j < chunkSize; j++) {
for (unsigned k = 0; k < chunkSize; k++) {
if (linkedChunk->isVoxelSolid(i,j,k)) {
if (lightingMethod == 0) { //fullbright lighting
//face U , V , I
//right face
if (!linkedChunk->isVoxelSolid(i+1,j,k)) {
addVertex(lightingData[0], 0.8f, 0.8f, 0.8f); //TL
addVertex(lightingData[0], 0.8f, 0.8f, 0.8f); //TR
addVertex(lightingData[0], 0.8f, 0.8f, 0.8f); //BL
addVertex(lightingData[0], 0.8f, 0.8f, 0.8f); //BR
addVertex(lightingData[0], 0.8f, 0.8f, 0.8f); //BL
addVertex(lightingData[0], 0.8f, 0.8f, 0.8f); //TR
}
if (!linkedChunk->isVoxelSolid(i-1,j,k)) {
//left face
addVertex(lightingData[1], 0.8f, 0.8f, 0.8f); //TL
addVertex(lightingData[1], 0.8f, 0.8f, 0.8f); //TR
addVertex(lightingData[1], 0.8f, 0.8f, 0.8f); //BL
addVertex(lightingData[1], 0.8f, 0.8f, 0.8f); //BR
addVertex(lightingData[1], 0.8f, 0.8f, 0.8f); //BL
addVertex(lightingData[1], 0.8f, 0.8f, 0.8f); //TR
}
if (!linkedChunk->isVoxelSolid(i,j+1,k)) {
//top face
addVertex(lightingData[2], 1.0f, 1.0f, 1.0f); //TL
addVertex(lightingData[2], 1.0f, 1.0f, 1.0f); //TR
addVertex(lightingData[2], 1.0f, 1.0f, 1.0f); //BL
addVertex(lightingData[2], 1.0f, 1.0f, 1.0f); //BR
addVertex(lightingData[2], 1.0f, 1.0f, 1.0f); //BL
addVertex(lightingData[2], 1.0f, 1.0f, 1.0f); //TR
}
if (!linkedChunk->isVoxelSolid(i,j-1,k)) {
//bottom face
addVertex(lightingData[3], 0.5f, 0.5f, 0.5f); //TL
addVertex(lightingData[3], 0.5f, 0.5f, 0.5f); //TR
addVertex(lightingData[3], 0.5f, 0.5f, 0.5f); //BL
addVertex(lightingData[3], 0.5f, 0.5f, 0.5f); //BR
addVertex(lightingData[3], 0.5f, 0.5f, 0.5f); //BL
addVertex(lightingData[3], 0.5f, 0.5f, 0.5f); //TR
}
if (!linkedChunk->isVoxelSolid(i,j,k-1)) {
//back face
addVertex(lightingData[4], 0.7f, 0.7f, 0.7f); //TL
addVertex(lightingData[4], 0.7f, 0.7f, 0.7f); //TR
addVertex(lightingData[4], 0.7f, 0.7f, 0.7f); //BL
addVertex(lightingData[4], 0.7f, 0.7f, 0.7f); //BR
addVertex(lightingData[4], 0.7f, 0.7f, 0.7f); //BL
addVertex(lightingData[4], 0.7f, 0.7f, 0.7f); //TR
}
if (!linkedChunk->isVoxelSolid(i,j,k+1)) {
//front face
addVertex(lightingData[5], 0.9f, 0.9f, 0.9f); //TL
addVertex(lightingData[5], 0.9f, 0.9f, 0.9f); //TR
addVertex(lightingData[5], 0.9f, 0.9f, 0.9f); //BL
addVertex(lightingData[5], 0.9f, 0.9f, 0.9f); //BR
addVertex(lightingData[5], 0.9f, 0.9f, 0.9f); //BL
addVertex(lightingData[5], 0.9f, 0.9f, 0.9f); //TR
}
} else if (lightingMethod == 1) { //blocky lighting (Need to implement!)
} else if (lightingMethod == 2) { //smooth lighting (Need to implement!)
}
}
}
}
}
hasLightingChanged = true;
}
void ChunkRenderer::updateVertexData() {
if (!updatingGeometry) {
//std::cout << "testing";
for (unsigned i = 0; i < 6; i++) {
if (hasGeometryChanged) {
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffers[i][0]);
glBufferData(GL_ARRAY_BUFFER, sizeof(float) * geometryVertices[i].size(), geometryVertices[i].data(), GL_STATIC_DRAW);
//hasGeometryChanged = false;
}
if (hasTexturesChanged) {
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffers[i][1]);
glBufferData(GL_ARRAY_BUFFER, sizeof(float) * textureCoords[i].size(), textureCoords[i].data(), GL_STATIC_DRAW);
//hasTexturesChanged = false;
}
if (hasLightingChanged) {
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffers[i][2]);
glBufferData(GL_ARRAY_BUFFER, sizeof(float) * lightingData[i].size(), lightingData[i].data(), GL_STATIC_DRAW);
//hasLightingChanged = false;
}
}
if (hasGeometryChanged) hasGeometryChanged = false;
if (hasTexturesChanged) hasTexturesChanged = false;
if (hasLightingChanged) hasLightingChanged = false;
for (int i = 0; i < 6; i++) {
vertexCounts[i] = faceCounts[i] * 6;
}
}
}
void ChunkRenderer::addVertex(std::vector<float>& data, const float& x, const float& y, const float& z) {
data.push_back(x);
data.push_back(y);
data.push_back(z);
}
}