447 lines
16 KiB
C++
447 lines
16 KiB
C++
#include "BlocksRenderer.h"
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#include <glm/glm.hpp>
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#include "Mesh.h"
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#include "UVRegion.h"
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#include "../constants.h"
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#include "../content/Content.h"
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#include "../voxels/Block.h"
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#include "../voxels/Chunk.h"
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#include "../voxels/VoxelsVolume.h"
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#include "../voxels/ChunksStorage.h"
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#include "../lighting/Lightmap.h"
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#include "../frontend/ContentGfxCache.h"
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using glm::ivec3;
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using glm::vec3;
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using glm::vec4;
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#define VERTEX_SIZE 6
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BlocksRenderer::BlocksRenderer(size_t capacity,
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const Content* content,
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const ContentGfxCache* cache,
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const EngineSettings& settings)
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: content(content),
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vertexOffset(0),
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indexOffset(0),
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indexSize(0),
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capacity(capacity),
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cache(cache),
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settings(settings) {
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vertexBuffer = new float[capacity];
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indexBuffer = new int[capacity];
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voxelsBuffer = new VoxelsVolume(CHUNK_W + 2, CHUNK_H, CHUNK_D + 2);
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blockDefsCache = content->indices->getBlockDefs();
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}
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BlocksRenderer::~BlocksRenderer() {
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delete voxelsBuffer;
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delete[] vertexBuffer;
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delete[] indexBuffer;
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}
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void BlocksRenderer::vertex(const vec3& coord,
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float u, float v,
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const vec4& light) {
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vertexBuffer[vertexOffset++] = coord.x;
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vertexBuffer[vertexOffset++] = coord.y;
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vertexBuffer[vertexOffset++] = coord.z;
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vertexBuffer[vertexOffset++] = u;
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vertexBuffer[vertexOffset++] = v;
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union {
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float floating;
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uint32_t integer;
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} compressed;
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compressed.integer = (uint32_t(light.r * 255) & 0xff) << 24;
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compressed.integer |= (uint32_t(light.g * 255) & 0xff) << 16;
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compressed.integer |= (uint32_t(light.b * 255) & 0xff) << 8;
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compressed.integer |= (uint32_t(light.a * 255) & 0xff);
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vertexBuffer[vertexOffset++] = compressed.floating;
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}
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void BlocksRenderer::index(int a, int b, int c, int d, int e, int f) {
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indexBuffer[indexSize++] = indexOffset + a;
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indexBuffer[indexSize++] = indexOffset + b;
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indexBuffer[indexSize++] = indexOffset + c;
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indexBuffer[indexSize++] = indexOffset + d;
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indexBuffer[indexSize++] = indexOffset + e;
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indexBuffer[indexSize++] = indexOffset + f;
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indexOffset += 4;
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}
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void BlocksRenderer::face(const vec3& coord, float w, float h,
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const vec3& axisX,
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const vec3& axisY,
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const UVRegion& region,
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const vec4(&lights)[4],
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const vec4& tint) {
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if (vertexOffset + VERTEX_SIZE * 4 > capacity) {
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overflow = true;
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return;
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}
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vertex(coord, region.u1, region.v1, lights[0] * tint);
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vertex(coord + axisX * w, region.u2, region.v1, lights[1] * tint);
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vertex(coord + axisX * w + axisY * h, region.u2, region.v2, lights[2] * tint);
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vertex(coord + axisY * h, region.u1, region.v2, lights[3] * tint);
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index(0, 1, 3, 1, 2, 3);
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}
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void BlocksRenderer::face(const vec3& coord, float w, float h,
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const vec3& axisX,
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const vec3& axisY,
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const UVRegion& region,
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const vec4(&lights)[4],
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const vec4& tint,
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bool rotated) {
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if (vertexOffset + VERTEX_SIZE * 4 > capacity) {
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overflow = true;
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return;
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}
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if (rotated) {
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vertex(coord, region.u2, region.v1, lights[0] * tint);
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vertex(coord + axisX * w, region.u2, region.v2, lights[1] * tint);
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vertex(coord + axisX * w + axisY * h, region.u1, region.v2, lights[2] * tint);
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vertex(coord + axisY * h, region.u1, region.v1, lights[3] * tint);
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index(0, 1, 2, 0, 2, 3);
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}
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else {
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vertex(coord, region.u1, region.v1, lights[0] * tint);
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vertex(coord + axisX * w, region.u2, region.v1, lights[1] * tint);
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vertex(coord + axisX * w + axisY * h, region.u2, region.v2, lights[2] * tint);
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vertex(coord + axisY * h, region.u1, region.v2, lights[3] * tint);
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index(0, 1, 2, 0, 2, 3);
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}
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}
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void BlocksRenderer::vertex(const ivec3& coord, float u, float v,
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const vec4& tint,
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const ivec3& axisX,
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const ivec3& axisY,
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const ivec3& axisZ) {
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vec4 light = pickSoftLight(coord+axisZ, axisX, axisY);
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vertex(coord, u, v, light * tint);
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}
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void BlocksRenderer::face(const ivec3& coord,
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const ivec3& axisX,
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const ivec3& axisY,
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const ivec3& axisZ,
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const UVRegion& region,
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const vec4& tint,
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bool rotated) {
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if (vertexOffset + VERTEX_SIZE * 4 > capacity) {
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overflow = true;
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return;
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}
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if (rotated) {
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vertex(coord, region.u2, region.v1, tint, axisX, axisY, axisZ);
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vertex(coord + axisX, region.u2, region.v2, tint, axisX, axisY, axisZ);
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vertex(coord + axisX + axisY, region.u1, region.v2, tint, axisX, axisY, axisZ);
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vertex(coord + axisY, region.u1, region.v1, tint, axisX, axisY, axisZ);
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index(0, 1, 2, 0, 2, 3);
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}
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else {
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vertex(coord, region.u1, region.v1, tint, axisX, axisY, axisZ);
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vertex(coord + axisX, region.u2, region.v1, tint, axisX, axisY, axisZ);
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vertex(coord + axisX + axisY, region.u2, region.v2, tint, axisX, axisY, axisZ);
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vertex(coord + axisY, region.u1, region.v2, tint, axisX, axisY, axisZ);
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index(0, 1, 2, 0, 2, 3);
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}
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}
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void BlocksRenderer::cube(const vec3& coord, const vec3& size, const UVRegion(&texfaces)[6]) {
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vec4 lights[]{ vec4(),vec4(),vec4(),vec4() };
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face(coord, size.x, size.y, vec3(1, 0, 0), vec3(0, 1, 0), texfaces[0], lights);
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face(coord + vec3(size.x, 0, -size.z), size.x, size.y, vec3(-1, 0, 0), vec3(0, 1, 0), texfaces[1], lights);
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face(coord + vec3(0, size.y, 0), size.x, size.z, vec3(1, 0, 0), vec3(0, 0, -1), texfaces[2], lights);
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face(coord + vec3(0, 0, -size.z), size.x, size.z, vec3(1, 0, 0), vec3(0, 0, 1), texfaces[3], lights);
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face(coord + vec3(0, 0, -size.z), size.z, size.y, vec3(0, 0, 1), vec3(0, 1, 0), texfaces[4], lights);
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face(coord + vec3(size.x, 0, 0), size.z, size.y, vec3(0, 0, -1), vec3(0, 1, 0), texfaces[5], lights);
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}
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void BlocksRenderer::blockCube(int x, int y, int z, const vec3& size, const UVRegion(&texfaces)[6], ubyte group) {
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vec4 lights[]{ vec4(1.0f), vec4(1.0f), vec4(1.0f), vec4(1.0f) };
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if (isOpen(x, y, z + 1, group)) {
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face(vec3(x, y, z), size.x, size.y, vec3(1, 0, 0), vec3(0, 1, 0), texfaces[5], lights, vec4(1.0f));
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}
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if (isOpen(x, y, z - 1, group)) {
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face(vec3(x + size.x, y, z - size.z), size.x, size.y, vec3(-1, 0, 0), vec3(0, 1, 0), texfaces[4], lights, vec4(1.0f));
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}
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if (isOpen(x, y + 1, z, group)) {
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face(vec3(x, y + size.y, z), size.x, size.z, vec3(1, 0, 0), vec3(0, 0, -1), texfaces[3], lights);
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}
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if (isOpen(x, y - 1, z, group)) {
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face(vec3(x, y, z - size.z), size.x, size.z, vec3(1, 0, 0), vec3(0, 0, 1), texfaces[2], lights, vec4(1.0f));
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}
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if (isOpen(x - 1, y, z, group)) {
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face(vec3(x, y, z - size.z), size.z, size.y, vec3(0, 0, 1), vec3(0, 1, 0), texfaces[0], lights, vec4(1.0f));
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}
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if (isOpen(x + 1, y, z, group)) {
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face(vec3(x + size.x, y, z), size.z, size.y, vec3(0, 0, -1), vec3(0, 1, 0), texfaces[1], lights, vec4(1.0f));
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}
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}
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void BlocksRenderer::blockXSprite(int x, int y, int z, const vec3& size, const UVRegion& texface1, const UVRegion& texface2, float spread) {
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vec4 lights[]{
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pickSoftLight({x, y + 1, z}, {1, 0, 0}, {0, 1, 0}),
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pickSoftLight({x + 1, y + 1, z}, {1, 0, 0}, {0, 1, 0}),
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pickSoftLight({x + 1, y + 1, z}, {1, 0, 0}, {0, 1, 0}),
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pickSoftLight({x, y + 1, z}, {1, 0, 0}, {0, 1, 0}) };
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int rand = ((x * z + y) ^ (z * y - x)) * (z + y);
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float xs = ((float)(char)rand / 512) * spread;
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float zs = ((float)(char)(rand >> 8) / 512) * spread;
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const float w = size.x / 1.41f;
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const float tint = 0.8f;
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face(vec3(x + xs + (1.0 - w) * 0.5f, y,
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z + zs - 1 + (1.0 - w) * 0.5f), w, size.y,
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vec3(1.0f, 0, 1.0f), vec3(0, 1, 0), texface1, lights, vec4(tint));
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face(vec3(x + xs - (1.0 - w) * 0.5f + 1, y,
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z + zs - (1.0 - w) * 0.5f), w, size.y,
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vec3(-1.0f, 0, -1.0f), vec3(0, 1, 0), texface1, lights, vec4(tint));
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face(vec3(x + xs + (1.0 - w) * 0.5f, y,
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z + zs - (1.0 - w) * 0.5f), w, size.y,
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vec3(1.0f, 0, -1.0f), vec3(0, 1, 0), texface2, lights, vec4(tint));
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face(vec3(x + xs - (1.0 - w) * 0.5f + 1, y,
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z + zs + (1.0 - w) * 0.5f - 1), w, size.y,
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vec3(-1.0f, 0, 1.0f), vec3(0, 1, 0), texface2, lights, vec4(tint));
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}
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void BlocksRenderer::blockCubeShaded(const vec3& pos, const vec3& size, const UVRegion(&texfaces)[6], const Block* block, ubyte states) {
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int rot = 0;
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float x = pos.x;
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float y = pos.y;
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float z = pos.z;
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{
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vec4 lights[]{
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pickSoftLight(x, y, z + 1, {1, 0, 0}, {0, 1, 0}),
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pickSoftLight(x + 1, y, z + 1, {1, 0, 0}, {0, 1, 0}),
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pickSoftLight(x + 1, y + 1, z + 1, {1, 0, 0}, {0, 1, 0}),
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pickSoftLight(x, y + 1, z + 1, {1, 0, 0}, {0, 1, 0}) };
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face(vec3(x, y, z), size.x, size.y, vec3(1, 0, 0), vec3(0, 1, 0), texfaces[5], lights, vec4(0.9f), rot == 1);
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} {
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vec4 lights[]{
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pickSoftLight(pos.x, pos.y, pos.z - 1, {-1, 0, 0}, {0, 1, 0}),
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pickSoftLight(pos.x - 1, pos.y, pos.z - 1, {-1, 0, 0}, {0, 1, 0}),
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pickSoftLight(pos.x - 1, pos.y + 1, pos.z - 1, {-1, 0, 0}, {0, 1, 0}),
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pickSoftLight(pos.x, pos.y + 1, pos.z - 1, {-1, 0, 0}, {0, 1, 0}) };
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face(vec3(x + size.x, y, z - size.z), size.x, size.y, vec3(-1, 0, 0), vec3(0, 1, 0), texfaces[4], lights, vec4(0.75f), rot == 1);
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} {
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vec4 lights[]{
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pickSoftLight(x, pos.y + 1, pos.z + 1, {1, 0, 0}, {0, 0, 1}),
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pickSoftLight(x + 1, pos.y + 1, pos.z + 1, {1, 0, 0}, {0, 0, 1}),
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pickSoftLight(x + 1, pos.y + 1, pos.z, {1, 0, 0}, {0, 0, 1}),
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pickSoftLight(x, pos.y + 1, pos.z, {1, 0, 0}, {0, 0, 1}) };
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face(vec3(x, y + size.y, z), size.x, size.z, vec3(1, 0, 0), vec3(0, 0, -1), texfaces[3], lights, vec4(1.0f), rot == 1);
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} {
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vec4 lights[]{
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pickSoftLight(pos.x, pos.y - 1, pos.z - 1, {1, 0, 0}, {0, 0, -1}),
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pickSoftLight(pos.x + 1, y - 1, pos.z - 1, {1, 0, 0}, {0, 0,-1}),
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pickSoftLight(pos.x + 1, y - 1, pos.z, {1, 0, 0}, {0, 0, -1}),
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pickSoftLight(x, y - 1, z, {1, 0, 0}, {0, 0, -1}) };
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face(vec3(x, y, z - size.z), size.x, size.z, vec3(1, 0, 0), vec3(0, 0, 1), texfaces[2], lights, vec4(0.6f), rot == 1);
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} {
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vec4 lights[]{
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pickSoftLight(x - 1, y, z - 1, {0, 0, -1}, {0, 1, 0}),
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pickSoftLight(x - 1, y, z, {0, 0, -1}, {0, 1, 0}),
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pickSoftLight(x - 1, y + 1, z, {0, 0, -1}, {0, 1, 0}),
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pickSoftLight(x - 1, y + 1, z - 1, {0, 0, -1}, {0, 1, 0}) };
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face(vec3(x, y, z - size.z), size.z, size.y, vec3(0, 0, 1), vec3(0, 1, 0), texfaces[0], lights, vec4(0.7f), rot == 3);
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} {
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vec4 lights[]{
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pickSoftLight(x + 1, y, z, {0, 0, -1}, {0, 1, 0}),
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pickSoftLight(x + 1, y, z - 1, {0, 0, -1}, {0, 1, 0}),
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pickSoftLight(x + 1, y + 1, z - 1, {0, 0, -1}, {0, 1, 0}),
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pickSoftLight(x + 1, y + 1, z, {0, 0, -1}, {0, 1, 0}) };
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face(vec3(x + size.x, y, z), size.z, size.y, vec3(0, 0, -1), vec3(0, 1, 0), texfaces[1], lights, vec4(0.8f), rot == 3);
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}
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}
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void BlocksRenderer::blockCubeShaded(int x, int y, int z, const UVRegion(&texfaces_)[6], const Block* block, ubyte states) {
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ubyte group = block->drawGroup;
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UVRegion texfaces[6];
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int rot = 0;
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for (int i = 0; i < 6; i++) {
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texfaces[i] = texfaces_[i];
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}
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if (block->rotatable) {
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if (states == BLOCK_DIR_X) {
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rot = 1;
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texfaces[0] = texfaces_[2];
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texfaces[1] = texfaces_[3];
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texfaces[2] = texfaces_[0];
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texfaces[3] = texfaces_[1];
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}
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else if (states == BLOCK_DIR_Y) {
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rot = 2;
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}
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else if (states == BLOCK_DIR_Z) {
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rot = 3;
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texfaces[2] = texfaces_[4];
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texfaces[3] = texfaces_[5];
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texfaces[4] = texfaces_[2];
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texfaces[5] = texfaces_[3];
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}
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}
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static const ivec3 X(1, 0, 0);
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static const ivec3 Y(0, 1, 0);
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static const ivec3 Z(0, 0, 1);
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if (isOpen(x+Z.x, y+Z.y, z+Z.z, group)) {
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face(ivec3(x, y, z), X, Y, Z, texfaces[5], vec4(0.9f), rot == 1);
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}
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if (isOpen(x-Z.x, y-Z.y, z-Z.z, group)) {
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face(ivec3(x, y, z)+X-Z, -X, Y, Z-Z-X, texfaces[4], vec4(0.75f), rot == 1);
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}
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if (isOpen(x+Y.x, y+Y.y, z+Y.z, group)) {
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face(ivec3(x, y, z)+Y, X, -Z, Y-Y, texfaces[3], vec4(1.0f), rot == 1);
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}
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if (isOpen(x-Y.x, y-Y.y, z-Y.z, group)) {
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face(ivec3(x, y, z)-Z, X, Z, -Y+Z, texfaces[2], vec4(0.6f), rot == 1);
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}
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if (isOpen(x+X.x, y+X.y, z+X.z, group)) {
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face(ivec3(x, y, z)+X, -Z, Y, X-X, texfaces[1], vec4(0.8f), rot == 3);
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}
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if (isOpen(x-X.x, y-X.y, z-X.z, group)) {
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face(ivec3(x, y, z)-Z, Z, Y, -X+Z, texfaces[0], vec4(0.7f), rot == 3);
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}
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}
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// Does block allow to see other blocks sides (is it transparent)
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bool BlocksRenderer::isOpen(int x, int y, int z, ubyte group) const {
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blockid_t id = voxelsBuffer->pickBlockId(chunk->x * CHUNK_W + x, y, chunk->z * CHUNK_D + z);
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if (id == BLOCK_VOID)
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return false;
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const Block& block = *blockDefsCache[id];
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if ((block.drawGroup != group && block.lightPassing) || !block.rt.solid) {
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return true;
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}
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return !id;
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}
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bool BlocksRenderer::isOpenForLight(int x, int y, int z) const {
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blockid_t id = voxelsBuffer->pickBlockId(chunk->x * CHUNK_W + x, y, chunk->z * CHUNK_D + z);
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if (id == BLOCK_VOID)
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return false;
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const Block& block = *blockDefsCache[id];
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if (block.lightPassing) {
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return true;
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}
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return !id;
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}
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vec4 BlocksRenderer::pickLight(int x, int y, int z) const {
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if (isOpenForLight(x, y, z)) {
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light_t light = voxelsBuffer->pickLight(chunk->x * CHUNK_W + x, y, chunk->z * CHUNK_D + z);
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return vec4(Lightmap::extract(light, 0) / 15.0f,
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Lightmap::extract(light, 1) / 15.0f,
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Lightmap::extract(light, 2) / 15.0f,
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Lightmap::extract(light, 3) / 15.0f);
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}
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else {
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return vec4(0.0f);
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}
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}
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vec4 BlocksRenderer::pickLight(const ivec3& coord) const {
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return pickLight(coord.x, coord.y, coord.z);
|
|
}
|
|
|
|
vec4 BlocksRenderer::pickSoftLight(const ivec3& coord,
|
|
const ivec3& right, const ivec3& up) const {
|
|
return (
|
|
pickLight(coord) +
|
|
pickLight(coord - right) +
|
|
pickLight(coord - right - up) +
|
|
pickLight(coord - up)) * 0.25f;
|
|
}
|
|
|
|
vec4 BlocksRenderer::pickSoftLight(float x, float y, float z,
|
|
const ivec3& right, const ivec3& up) const {
|
|
return pickSoftLight({int(round(x)), int(round(y)), int(round(z))}, right, up);
|
|
}
|
|
|
|
void BlocksRenderer::render(const voxel* voxels, int atlas_size) {
|
|
int begin = chunk->bottom * (CHUNK_W * CHUNK_D);
|
|
int end = chunk->top * (CHUNK_W * CHUNK_D);
|
|
for (const auto drawGroup : *content->drawGroups) {
|
|
for (int i = begin; i < end; i++) {
|
|
const voxel& vox = voxels[i];
|
|
blockid_t id = vox.id;
|
|
const Block& def = *blockDefsCache[id];
|
|
if (!id || def.drawGroup != drawGroup)
|
|
continue;
|
|
const UVRegion texfaces[6]{ cache->getRegion(id, 0), cache->getRegion(id, 1),
|
|
cache->getRegion(id, 2), cache->getRegion(id, 3),
|
|
cache->getRegion(id, 4), cache->getRegion(id, 5)};
|
|
int x = i % CHUNK_W;
|
|
int y = i / (CHUNK_D * CHUNK_W);
|
|
int z = (i / CHUNK_D) % CHUNK_W;
|
|
switch (def.model) {
|
|
case BlockModel::block:
|
|
if (def.rt.emissive) {
|
|
blockCube(x, y, z, vec3(1.0f), texfaces, def.drawGroup);
|
|
}
|
|
else {
|
|
blockCubeShaded(x, y, z, texfaces, &def, vox.states);
|
|
}
|
|
break;
|
|
case BlockModel::xsprite: {
|
|
blockXSprite(x, y, z, vec3(1.0f), texfaces[FACE_MX], texfaces[FACE_MZ], 1.0f);
|
|
break;
|
|
}
|
|
case BlockModel::aabb: {
|
|
vec3 size = def.hitbox.size();
|
|
vec3 off = def.hitbox.min();
|
|
off.z *= -1.0f;
|
|
off.z = -1.0f-off.z + size.z;
|
|
blockCubeShaded(off+vec3(x,y,z), size, texfaces, &def, vox.states);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
if (overflow)
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
Mesh* BlocksRenderer::render(const Chunk* chunk, int atlas_size, const ChunksStorage* chunks) {
|
|
this->chunk = chunk;
|
|
voxelsBuffer->setPosition(chunk->x * CHUNK_W - 1, 0, chunk->z * CHUNK_D - 1);
|
|
chunks->getVoxels(voxelsBuffer, settings.graphics.backlight);
|
|
overflow = false;
|
|
vertexOffset = 0;
|
|
indexOffset = indexSize = 0;
|
|
const voxel* voxels = chunk->voxels;
|
|
render(voxels, atlas_size);
|
|
|
|
const vattr attrs[]{ {3}, {2}, {1}, {0} };
|
|
Mesh* mesh = new Mesh(vertexBuffer, vertexOffset / VERTEX_SIZE, indexBuffer, indexSize, attrs);
|
|
return mesh;
|
|
}
|
|
|
|
VoxelsVolume* BlocksRenderer::getVoxelsBuffer() const {
|
|
return voxelsBuffer;
|
|
}
|