254 lines
8.9 KiB
C++
254 lines
8.9 KiB
C++
#include "world_render.h"
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#include <iostream>
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#include <GL/glew.h>
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#include <memory>
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#include <assert.h>
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#include "../content/Content.h"
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#include "../graphics/ChunksRenderer.h"
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#include "../window/Window.h"
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#include "../window/Camera.h"
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#include "../graphics/Mesh.h"
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#include "../graphics/Atlas.h"
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#include "../graphics/Shader.h"
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#include "../graphics/Texture.h"
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#include "../graphics/LineBatch.h"
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#include "../voxels/Chunks.h"
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#include "../voxels/Chunk.h"
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#include "../voxels/Block.h"
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#include "../world/World.h"
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#include "../world/Level.h"
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#include "../world/LevelEvents.h"
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#include "../objects/Player.h"
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#include "../assets/Assets.h"
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#include "../objects/player_control.h"
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#include "../maths/FrustumCulling.h"
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#include "../maths/voxmaths.h"
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#include "../settings.h"
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#include "../engine.h"
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#include "ContentGfxCache.h"
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#include "graphics/Skybox.h"
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using glm::vec3;
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using glm::vec4;
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using std::string;
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using std::shared_ptr;
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WorldRenderer::WorldRenderer(Engine* engine, Level* level, const ContentGfxCache* cache)
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: engine(engine), level(level) {
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EngineSettings& settings = engine->getSettings();
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lineBatch = new LineBatch(4096);
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renderer = new ChunksRenderer(level, cache, settings);
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frustumCulling = new Frustum();
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level->events->listen(EVT_CHUNK_HIDDEN, [this](lvl_event_type type, Chunk* chunk) {
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renderer->unload(chunk);
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});
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skybox = new Skybox(64, engine->getAssets()->getShader("skybox_gen"));
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}
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WorldRenderer::~WorldRenderer() {
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delete skybox;
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delete lineBatch;
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delete renderer;
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delete frustumCulling;
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}
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bool WorldRenderer::drawChunk(size_t index, Camera* camera, Shader* shader, bool occlusion){
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shared_ptr<Chunk> chunk = level->chunks->chunks[index];
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if (!chunk->isLighted())
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return false;
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shared_ptr<Mesh> mesh = renderer->getOrRender(chunk.get());
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if (mesh == nullptr)
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return false;
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// Simple frustum culling
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if (occlusion){
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vec3 min(chunk->x * CHUNK_W, chunk->bottom, chunk->z * CHUNK_D);
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vec3 max(chunk->x * CHUNK_W + CHUNK_W, chunk->top, chunk->z * CHUNK_D + CHUNK_D);
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if (!frustumCulling->IsBoxVisible(min, max)) return false;
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}
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mat4 model = glm::translate(mat4(1.0f), vec3(chunk->x*CHUNK_W, 0.0f, chunk->z*CHUNK_D+1));
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shader->uniformMatrix("u_model", model);
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mesh->draw();
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return true;
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}
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void WorldRenderer::drawChunks(Chunks* chunks,
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Camera* camera,
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Shader* shader,
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bool occlusion) {
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std::vector<size_t> indices;
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for (size_t i = 0; i < chunks->volume; i++){
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shared_ptr<Chunk> chunk = chunks->chunks[i];
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if (chunk == nullptr)
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continue;
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indices.push_back(i);
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}
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float px = camera->position.x / (float)CHUNK_W;
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float pz = camera->position.z / (float)CHUNK_D;
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std::sort(indices.begin(), indices.end(), [this, chunks, px, pz](size_t i, size_t j) {
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shared_ptr<Chunk> a = chunks->chunks[i];
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shared_ptr<Chunk> b = chunks->chunks[j];
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return ((a->x + 0.5f - px)*(a->x + 0.5f - px) + (a->z + 0.5f - pz)*(a->z + 0.5f - pz) >
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(b->x + 0.5f - px)*(b->x + 0.5f - px) + (b->z + 0.5f - pz)*(b->z + 0.5f - pz));
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});
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if (occlusion) frustumCulling->update(camera->getProjView());
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chunks->visible = 0;
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for (size_t i = 0; i < indices.size(); i++){
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chunks->visible += drawChunk(indices[i], camera, shader, occlusion);
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}
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}
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void WorldRenderer::draw(const GfxContext& pctx, Camera* camera, bool occlusion){
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EngineSettings& settings = engine->getSettings();
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skybox->refresh(level->world->daytime,
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fmax(1.0f, 18.0f/settings.chunks.loadDistance), 4);
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const Content* content = level->content;
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const ContentIndices* contentIds = content->indices;
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Assets* assets = engine->getAssets();
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Atlas* atlas = assets->getAtlas("blocks");
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Shader* shader = assets->getShader("main");
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Shader* linesShader = assets->getShader("lines");
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const Viewport& viewport = pctx.getViewport();
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int displayWidth = viewport.getWidth();
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int displayHeight = viewport.getHeight();
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Window::clearDepth();
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Window::viewport(0, 0, displayWidth, displayHeight);
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Shader* backShader = assets->getShader("background");
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backShader->use();
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backShader->uniformMatrix("u_view", camera->getView(false));
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backShader->uniform1f("u_zoom", camera->zoom);
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backShader->uniform1f("u_ar", (float)Window::width/(float)Window::height);
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skybox->draw(backShader);
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{
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GfxContext ctx = pctx.sub();
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ctx.depthTest(true);
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ctx.cullFace(true);
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float fogFactor = 18.0f / (float)settings.chunks.loadDistance;
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shader->use();
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skybox->bind();
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shader->uniformMatrix("u_proj", camera->getProjection());
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shader->uniformMatrix("u_view", camera->getView());
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shader->uniform1f("u_gamma", 1.0f);
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shader->uniform1f("u_fogFactor", fogFactor);
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shader->uniform1f("u_fogCurve", settings.graphics.fogCurve);
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shader->uniform3f("u_cameraPos", camera->position);
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shader->uniform1i("u_cubemap", 1);
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Block* cblock = contentIds->getBlockDef(level->player->choosenBlock);
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assert(cblock != nullptr);
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float multiplier = 0.5f;
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shader->uniform3f("u_torchlightColor",
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cblock->emission[0] / 15.0f * multiplier,
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cblock->emission[1] / 15.0f * multiplier,
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cblock->emission[2] / 15.0f * multiplier);
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shader->uniform1f("u_torchlightDistance", 6.0f);
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atlas->getTexture()->bind();
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Chunks* chunks = level->chunks;
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drawChunks(chunks, camera, shader, occlusion);
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shader->uniformMatrix("u_model", mat4(1.0f));
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if (level->playerController->selectedBlockId != -1){
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Block* block = contentIds->getBlockDef(level->playerController->selectedBlockId);
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assert(block != nullptr);
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vec3 pos = level->playerController->selectedBlockPosition;
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linesShader->use();
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linesShader->uniformMatrix("u_projview", camera->getProjView());
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lineBatch->lineWidth(2.0f);
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const AABB& hitbox = block->hitbox;
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const vec3 center = pos + hitbox.center();
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const vec3 size = hitbox.size();
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lineBatch->box(center, size + vec3(0.02), vec4(0.0f, 0.0f, 0.0f, 0.5f));
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lineBatch->render();
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}
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skybox->unbind();
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}
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if (level->player->debug) {
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GfxContext ctx = pctx.sub();
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ctx.depthTest(true);
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linesShader->use();
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if (settings.debug.showChunkBorders){
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linesShader->uniformMatrix("u_projview", camera->getProjView());
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vec3 coord = level->player->camera->position;
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if (coord.x < 0) coord.x--;
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if (coord.z < 0) coord.z--;
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int cx = floordiv((int)coord.x, CHUNK_W);
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int cz = floordiv((int)coord.z, CHUNK_D);
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/*corner*/ {
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lineBatch->line( cx * CHUNK_W, 0, cz * CHUNK_D,
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cx * CHUNK_W, CHUNK_H, cz * CHUNK_D, 0.8f, 0, 0.8f, 1);
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lineBatch->line( cx * CHUNK_W, 0, (cz+1) * CHUNK_D,
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cx * CHUNK_W, CHUNK_H, (cz+1) * CHUNK_D, 0.8f, 0, 0.8f, 1);
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lineBatch->line((cx+1) * CHUNK_W, 0, cz * CHUNK_D,
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(cx+1) * CHUNK_W, CHUNK_H, cz * CHUNK_D, 0.8f, 0, 0.8f, 1);
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lineBatch->line((cx+1) * CHUNK_W, 0, (cz+1) * CHUNK_D,
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(cx+1) * CHUNK_W, CHUNK_H, (cz+1) * CHUNK_D, 0.8f, 0, 0.8f, 1);
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}
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for (int i = 2; i < CHUNK_W; i+=2) {
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lineBatch->line( cx * CHUNK_W + i, 0, cz * CHUNK_D,
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cx * CHUNK_W + i, CHUNK_H, cz * CHUNK_D, 0, 0, 0.8f, 1);
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lineBatch->line( cx * CHUNK_W + i, 0, (cz+1) * CHUNK_D,
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cx * CHUNK_W + i, CHUNK_H, (cz+1) * CHUNK_D, 0, 0, 0.8f, 1);
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}
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for (int i = 2; i < CHUNK_D; i+=2) {
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lineBatch->line( cx * CHUNK_W, 0, cz * CHUNK_D + i,
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cx * CHUNK_W, CHUNK_H, cz * CHUNK_D + i, 0.8f, 0, 0, 1);
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lineBatch->line((cx+1) * CHUNK_W, 0, cz * CHUNK_D + i,
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(cx+1) * CHUNK_W, CHUNK_H, cz * CHUNK_D + i, 0.8f, 0, 0, 1);
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}
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for (int i=0; i < CHUNK_H; i+=2){
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lineBatch->line( cx * CHUNK_W, i, cz * CHUNK_D,
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cx * CHUNK_W, i, (cz+1) * CHUNK_D, 0, 0.8f, 0, 1);
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lineBatch->line( cx * CHUNK_W, i, (cz+1) * CHUNK_D,
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(cx+1) * CHUNK_W, i, (cz+1) * CHUNK_D, 0, 0.8f, 0, 1);
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lineBatch->line((cx+1) * CHUNK_W, i, (cz+1) * CHUNK_D,
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(cx+1) * CHUNK_W, i, cz * CHUNK_D, 0, 0.8f, 0, 1);
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lineBatch->line((cx+1) * CHUNK_W, i, cz * CHUNK_D,
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cx * CHUNK_W, i, cz * CHUNK_D, 0, 0.8f, 0, 1);
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}
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lineBatch->render();
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}
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float length = 40.f;
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// top-right: vec3 tsl = vec3(displayWidth - length - 4, -length - 4, 0.f);
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vec3 tsl = vec3(displayWidth/2, displayHeight/2, 0.f);
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glm::mat4 model(glm::translate(glm::mat4(1.f), tsl));
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linesShader->uniformMatrix("u_projview", glm::ortho(
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0.f, (float)displayWidth,
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0.f, (float)displayHeight,
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-length, length) * model * glm::inverse(camera->rotation));
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ctx.depthTest(false);
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lineBatch->lineWidth(4.0f);
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lineBatch->line(0.f, 0.f, 0.f, length, 0.f, 0.f, 0.f, 0.f, 0.f, 1.f);
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lineBatch->line(0.f, 0.f, 0.f, 0.f, length, 0.f, 0.f, 0.f, 0.f, 1.f);
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lineBatch->line(0.f, 0.f, 0.f, 0.f, 0.f, length, 0.f, 0.f, 0.f, 1.f);
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lineBatch->render();
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ctx.depthTest(true);
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lineBatch->lineWidth(2.0f);
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lineBatch->line(0.f, 0.f, 0.f, length, 0.f, 0.f, 1.f, 0.f, 0.f, 1.f);
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lineBatch->line(0.f, 0.f, 0.f, 0.f, length, 0.f, 0.f, 1.f, 0.f, 1.f);
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lineBatch->line(0.f, 0.f, 0.f, 0.f, 0.f, length, 0.f, 0.f, 1.f, 1.f);
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lineBatch->render();
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}
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}
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