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-rw-r--r--old/graphics/RenderSection.cpp356
1 files changed, 356 insertions, 0 deletions
diff --git a/old/graphics/RenderSection.cpp b/old/graphics/RenderSection.cpp
new file mode 100644
index 0000000..8ebd2c0
--- /dev/null
+++ b/old/graphics/RenderSection.cpp
@@ -0,0 +1,356 @@
+#include "RenderSection.hpp"
+#include <thread>
+
+const GLfloat vertices[] = {
+ 0, 0, 0,
+ 1, 0, 1,
+ 1, 0, 0,
+
+ 0, 0, 0,
+ 0, 0, 1,
+ 1, 0, 1,
+};
+
+const GLfloat uv_coords[] = {
+ 0.0f, 0.0f,
+ 1.0f, 1.0f,
+ 0.0f, 1.0f,
+
+ 0.0f, 0.0f,
+ 1.0f, 0.0f,
+ 1.0f, 1.0f,
+};
+
+void RenderState::SetActiveVao(GLuint Vao) {
+ if (Vao != ActiveVao) {
+ glBindVertexArray(Vao);
+ ActiveVao = Vao;
+ }
+}
+
+void RenderState::SetActiveShader(GLuint Shader) {
+ if (Shader != ActiveShader) {
+ glUseProgram(Shader);
+ ActiveShader = Shader;
+ }
+}
+
+const GLuint magicUniqueConstant = 88375;
+GLuint RenderSection::VboVertices = magicUniqueConstant;
+GLuint RenderSection::VboUvs = magicUniqueConstant;
+std::map<GLuint, int> RenderSection::refCounterVbo;
+std::map<GLuint, int> RenderSection::refCounterVao;
+
+
+RenderSection::RenderSection(World *world, Vector position) : sectionPosition(position), world(world) {
+ if (VboVertices == magicUniqueConstant) {
+ glGenBuffers(1, &VboVertices);
+ glGenBuffers(1, &VboUvs);
+
+ //Cube vertices
+ glBindBuffer(GL_ARRAY_BUFFER, VboVertices);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+ //Cube UVs
+ glBindBuffer(GL_ARRAY_BUFFER, VboUvs);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(uv_coords), uv_coords, GL_STATIC_DRAW);
+
+ LOG(INFO) << "Created VBOs with vertices (" << VboVertices << ") and UVs (" << VboUvs
+ << ") for ordinary blocks";
+ }
+
+ glGenBuffers(1, &VboTextures);
+ if (refCounterVbo.find(VboTextures) == refCounterVbo.end())
+ refCounterVbo[VboTextures] = 0;
+ refCounterVbo[VboTextures]++;
+
+ glGenBuffers(1, &VboModels);
+ if (refCounterVbo.find(VboModels) == refCounterVbo.end())
+ refCounterVbo[VboModels] = 0;
+ refCounterVbo[VboModels]++;
+
+ glGenBuffers(1, &VboColors);
+ if (refCounterVbo.find(VboColors) == refCounterVbo.end())
+ refCounterVbo[VboColors] = 0;
+ refCounterVbo[VboColors]++;
+
+ glGenVertexArrays(1, &Vao);
+ if (refCounterVao.find(Vao) == refCounterVao.end())
+ refCounterVao[Vao] = 0;
+ refCounterVao[Vao]++;
+
+ glBindVertexArray(Vao);
+ {
+ //Cube vertices
+ GLuint VertAttribPos = 0;
+ glBindBuffer(GL_ARRAY_BUFFER, VboVertices);
+ glVertexAttribPointer(VertAttribPos, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), nullptr);
+ glEnableVertexAttribArray(VertAttribPos);
+
+ //Cube UVs
+ GLuint UvAttribPos = 2;
+ glBindBuffer(GL_ARRAY_BUFFER, VboUvs);
+ glVertexAttribPointer(UvAttribPos, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(GLfloat), nullptr);
+ glEnableVertexAttribArray(UvAttribPos);
+
+ //Textures
+ GLuint textureAttribPos = 7;
+ glBindBuffer(GL_ARRAY_BUFFER, VboTextures);
+ glVertexAttribPointer(textureAttribPos, 4, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), nullptr);
+ glEnableVertexAttribArray(textureAttribPos);
+ glVertexAttribDivisor(textureAttribPos, 1);
+ glCheckError();
+
+ //Blocks models
+ GLuint matAttribPos = 8;
+ size_t sizeOfMat4 = 4 * 4 * sizeof(GLfloat);
+ glBindBuffer(GL_ARRAY_BUFFER, VboModels);
+ glVertexAttribPointer(matAttribPos + 0, 4, GL_FLOAT, GL_FALSE, sizeOfMat4, nullptr);
+ glVertexAttribPointer(matAttribPos + 1, 4, GL_FLOAT, GL_FALSE, sizeOfMat4, (void *) (1 * 4 * sizeof(GLfloat)));
+ glVertexAttribPointer(matAttribPos + 2, 4, GL_FLOAT, GL_FALSE, sizeOfMat4, (void *) (2 * 4 * sizeof(GLfloat)));
+ glVertexAttribPointer(matAttribPos + 3, 4, GL_FLOAT, GL_FALSE, sizeOfMat4, (void *) (3 * 4 * sizeof(GLfloat)));
+ glEnableVertexAttribArray(matAttribPos + 0);
+ glEnableVertexAttribArray(matAttribPos + 1);
+ glEnableVertexAttribArray(matAttribPos + 2);
+ glEnableVertexAttribArray(matAttribPos + 3);
+ glVertexAttribDivisor(matAttribPos + 0, 1);
+ glVertexAttribDivisor(matAttribPos + 1, 1);
+ glVertexAttribDivisor(matAttribPos + 2, 1);
+ glVertexAttribDivisor(matAttribPos + 3, 1);
+
+ //Color
+ GLuint colorAttribPos = 12;
+ glBindBuffer(GL_ARRAY_BUFFER, VboColors);
+ glVertexAttribPointer(colorAttribPos, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), nullptr);
+ glEnableVertexAttribArray(colorAttribPos);
+ glVertexAttribDivisor(colorAttribPos, 1);
+
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+ }
+ glBindVertexArray(0);
+ glCheckError();
+}
+
+RenderSection::~RenderSection() {
+ refCounterVbo[VboTextures]--;
+ refCounterVbo[VboModels]--;
+ refCounterVbo[VboColors]--;
+ refCounterVao[Vao]--;
+ if (refCounterVbo[VboTextures] <= 0)
+ glDeleteBuffers(1, &VboTextures);
+
+ if (refCounterVbo[VboModels] <= 0)
+ glDeleteBuffers(1, &VboTextures);
+ if (refCounterVbo[VboColors] <= 0)
+ glDeleteBuffers(1, &VboColors);
+
+ if (refCounterVao[Vao] <= 0)
+ glDeleteVertexArrays(1, &Vao);
+}
+
+void RenderSection::UpdateState(const std::map<BlockTextureId, glm::vec4> &textureAtlas) {
+ Section &section = world->GetSection(sectionPosition);
+ models.clear();
+ textures.clear();
+ colors.clear();
+ for (int y = 0; y < 16; y++) {
+ for (int z = 0; z < 16; z++) {
+ for (int x = 0; x < 16; x++) {
+ Vector blockPos = Vector(x, y, z) + (sectionPosition * 16);
+ Block &block = world->GetBlock(blockPos);
+ if (block.id == 0)
+ continue;
+
+ auto checkBlockVisibility = [&](Vector block) -> bool {
+ return section.GetBlock(block).id == 0 ||
+ section.GetBlock(block).id == 31 ||
+ section.GetBlock(block).id == 18;
+ };
+
+ unsigned char isVisible = 0;
+ if (x == 0 || x == 15 || y == 0 || y == 15 || z == 0 || z == 15) {
+ isVisible = 0b1111'1111; //All faces is visible
+ } else {
+ isVisible |= checkBlockVisibility(Vector(x - 1, y, z)) << 0;
+ isVisible |= checkBlockVisibility(Vector(x + 1, y, z)) << 1;
+ isVisible |= checkBlockVisibility(Vector(x, y + 1, z)) << 2;
+ isVisible |= checkBlockVisibility(Vector(x, y - 1, z)) << 3;
+ isVisible |= checkBlockVisibility(Vector(x, y, z - 1)) << 4;
+ isVisible |= checkBlockVisibility(Vector(x, y, z + 1)) << 5;
+ }
+
+ if (isVisible == 0x00)
+ continue;
+
+ glm::mat4 transform;
+ transform = glm::translate(transform, glm::vec3(sectionPosition.GetX() * 16,
+ sectionPosition.GetY() * 16,
+ sectionPosition.GetZ() * 16));
+ transform = glm::translate(transform, glm::vec3(x, y, z));
+ glm::vec3 biomeColor(0.275, 0.63, 0.1);
+ glm::vec3 color(0.0f, 0.0f, 0.0f);
+ if (block.id == 31 || block.id == 18)
+ color = biomeColor;
+
+ if (block.id == 31) { //X-cross like blocks rendering
+ auto texture = textureAtlas.find(BlockTextureId(block.id, block.state, 2));
+ for (int i = 0; i < 4; i++) {
+ textures.push_back(texture->second);
+ colors.push_back(color);
+ }
+ glm::mat4 faceTransform = glm::translate(transform, glm::vec3(0.15f, 0, 0.15f));
+ faceTransform = glm::scale(faceTransform, glm::vec3(1.0f, 0.9f, 1.0f));
+ faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(0, 0.0f, 1.0f));
+ faceTransform = glm::rotate(faceTransform, glm::radians(45.0f), glm::vec3(1.0f, 0.0f, 0));
+ for (int i = 0; i < 4; i++) {
+ models.push_back(faceTransform);
+ faceTransform = glm::translate(faceTransform, glm::vec3(0.0f, 0.0f, 0.5f));
+ faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(1.0f, 0.0f, 0.0f));
+ faceTransform = glm::translate(faceTransform, glm::vec3(0.0f, 0.0f, -0.5f));
+ }
+ continue;
+ }
+
+ if (isVisible >> 0 & 0x1) { //east side of block (X+)
+ glm::mat4 faceTransform = glm::translate(transform, glm::vec3(0, 0, 0));
+ faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(0, 0.0f, 1.0f));
+ models.push_back(faceTransform);
+ auto texture = textureAtlas.find(BlockTextureId(block.id, block.state, 2));
+ if (texture != textureAtlas.end())
+ textures.push_back(texture->second);
+ else
+ textures.push_back(glm::vec4(0.0546875, 0.00442477876106194690,
+ 0.0078125, 0.00442477876106194690)); //Fallback TNT texture
+ colors.push_back(color);
+ }
+ if (isVisible >> 1 & 0x1) { //west side X-
+ glm::mat4 faceTransform = glm::translate(transform, glm::vec3(1, 0, 0));
+ faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(0, 0.0f, 1.0f));
+ faceTransform = glm::rotate(faceTransform, glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f));
+ faceTransform = glm::translate(faceTransform, glm::vec3(0, 0, -1));
+ models.push_back(faceTransform);
+ auto texture = textureAtlas.find(BlockTextureId(block.id, block.state, 3));
+ if (texture != textureAtlas.end())
+ textures.push_back(texture->second);
+ else
+ textures.push_back(glm::vec4(0.0546875, 0.00442477876106194690,
+ 0.0078125, 0.00442477876106194690)); //Fallback TNT texture
+ colors.push_back(color);
+ }
+ if (isVisible >> 2 & 0x1) { //Top side Y+
+ glm::mat4 faceTransform = glm::translate(transform, glm::vec3(0, 1, 0));
+ models.push_back(faceTransform);
+ auto texture = textureAtlas.find(BlockTextureId(block.id, block.state, 1));
+ if (texture != textureAtlas.end())
+ textures.push_back(texture->second);
+ else
+ textures.push_back(glm::vec4(0.0546875, 0.00442477876106194690,
+ 0.0078125, 0.00442477876106194690)); //Fallback TNT texture
+ if (block.id != 2)
+ colors.push_back(color);
+ else
+ colors.push_back(biomeColor);
+ }
+ if (isVisible >> 3 & 0x1) { //Bottom side Y-
+ glm::mat4 faceTransform = glm::translate(transform, glm::vec3(0, 0, 0));
+ faceTransform = glm::rotate(faceTransform, glm::radians(180.0f), glm::vec3(1.0f, 0, 0));
+ faceTransform = glm::translate(faceTransform, glm::vec3(0, 0, -1));
+ models.push_back(faceTransform);
+ auto texture = textureAtlas.find(BlockTextureId(block.id, block.state, 0));
+ if (texture != textureAtlas.end())
+ textures.push_back(texture->second);
+ else
+ textures.push_back(glm::vec4(0.0546875, 0.00442477876106194690,
+ 0.0078125, 0.00442477876106194690)); //Fallback TNT texture
+ colors.push_back(color);
+ }
+ if (isVisible >> 4 & 0x1) { //south side Z+
+ glm::mat4 faceTransform = glm::translate(transform, glm::vec3(1, 0, 0));
+ faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(-1.0f, 0.0f, 0.0f));
+ faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(0.0f, -1.0f, 0.0f));
+ models.push_back(faceTransform);
+ auto texture = textureAtlas.find(BlockTextureId(block.id, block.state, 3));
+ if (texture != textureAtlas.end())
+ textures.push_back(texture->second);
+ else
+ textures.push_back(glm::vec4(0.0546875, 0.00442477876106194690,
+ 0.0078125, 0.00442477876106194690)); //Fallback TNT texture
+ colors.push_back(color);
+ }
+ if (isVisible >> 5 & 0x1) { //north side Z-
+ glm::mat4 faceTransform = glm::translate(transform, glm::vec3(0, 0, 1));
+ faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(-1.0f, 0.0f, 0.0f));
+ faceTransform = glm::rotate(faceTransform, glm::radians(90.0f), glm::vec3(0.0f, -1.0f, 0.0f));
+ faceTransform = glm::translate(faceTransform, glm::vec3(0, 0, -1));
+ faceTransform = glm::rotate(faceTransform, glm::radians(180.0f), glm::vec3(1, 0, 0.0f));
+ faceTransform = glm::translate(faceTransform, glm::vec3(0, 0, -1.0f));
+ models.push_back(faceTransform);
+ auto texture = textureAtlas.find(BlockTextureId(block.id, block.state, 4));
+ if (texture != textureAtlas.end())
+ textures.push_back(texture->second);
+ else
+ textures.push_back(glm::vec4(0.0546875, 0.00442477876106194690,
+ 0.0078125, 0.00442477876106194690)); //Fallback TNT texture
+ colors.push_back(color);
+ }
+ }
+ }
+ }
+ numOfFaces = textures.size();
+ hash = section.GetHash();
+}
+
+void RenderSection::Render(RenderState &state) {
+ if (!isEnabled) return;
+ if (!models.empty()) {
+ glBindBuffer(GL_ARRAY_BUFFER, VboTextures);
+ glBufferData(GL_ARRAY_BUFFER, textures.size() * sizeof(glm::vec4), textures.data(), GL_DYNAMIC_DRAW);
+ textures.clear();
+
+ glBindBuffer(GL_ARRAY_BUFFER, VboModels);
+ glBufferData(GL_ARRAY_BUFFER, models.size() * sizeof(glm::mat4), models.data(), GL_DYNAMIC_DRAW);
+ models.clear();
+
+ glBindBuffer(GL_ARRAY_BUFFER, VboColors);
+ glBufferData(GL_ARRAY_BUFFER, colors.size() * sizeof(glm::vec3), colors.data(), GL_DYNAMIC_DRAW);
+ colors.clear();
+
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+ }
+ state.SetActiveVao(Vao);
+ glDrawArraysInstanced(GL_TRIANGLES, 0, 6, numOfFaces);
+ glCheckError();
+}
+
+Section *RenderSection::GetSection() {
+ return &world->GetSection(sectionPosition);
+}
+
+RenderSection::RenderSection(const RenderSection &other) {
+ this->world = other.world;
+ this->VboModels = other.VboModels;
+ this->VboTextures = other.VboTextures;
+ this->VboColors = other.VboColors;
+ this->sectionPosition = other.sectionPosition;
+ this->Vao = other.Vao;
+ this->numOfFaces = other.numOfFaces;
+ this->models = other.models;
+ this->textures = other.textures;
+ this->colors = other.colors;
+ this->hash = other.hash;
+
+ refCounterVbo[VboTextures]++;
+ refCounterVbo[VboModels]++;
+ refCounterVbo[VboColors]++;
+ refCounterVao[Vao]++;
+}
+
+void RenderSection::SetEnabled(bool isEnabled) {
+ this->isEnabled = isEnabled;
+}
+
+bool RenderSection::IsNeedUpdate() {
+ size_t currentHash = world->GetSection(sectionPosition).GetHash();
+ bool isNeedUpdate = currentHash != hash;
+ return isNeedUpdate;
+} \ No newline at end of file
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