113 lines
4.5 KiB
C++
113 lines
4.5 KiB
C++
// playfield.cpp - Implementació del fons del playfield
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// © 2026 JailDesigner
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#include "core/graphics/playfield.hpp"
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#include <algorithm>
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#include "core/defaults.hpp"
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#include "core/rendering/line_renderer.hpp"
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namespace Graphics {
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Playfield::Playfield(Rendering::Renderer* renderer)
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: renderer_(renderer) {
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buildLines();
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total_slots_ = static_cast<int>(lines_.size());
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// Distribuïm els spawns de manera que la última línia acabe just a TOTAL_ANIMATION_DURATION_S.
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// last_line_start = (N-1) * spawn_interval
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// last_line_end = last_line_start + LINE_GROWTH_DURATION_S = TOTAL_ANIMATION_DURATION_S
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if (total_slots_ > 1) {
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spawn_interval_s_ =
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(Defaults::Playfield::TOTAL_ANIMATION_DURATION_S - Defaults::Playfield::LINE_GROWTH_DURATION_S) / static_cast<float>(total_slots_ - 1);
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}
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}
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void Playfield::update(float delta_time) {
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elapsed_s_ += delta_time;
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}
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void Playfield::buildLines() {
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const SDL_FRect& zona = Defaults::Zones::PLAYAREA;
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const float CELL_W = zona.w / static_cast<float>(Defaults::Playfield::COLUMNS);
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const float CELL_H = zona.h / static_cast<float>(Defaults::Playfield::ROWS);
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const float SUB_W = CELL_W / static_cast<float>(Defaults::Playfield::SUBDIVISIONS);
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const float SUB_H = CELL_H / static_cast<float>(Defaults::Playfield::SUBDIVISIONS);
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const int SUB_VERTS = Defaults::Playfield::COLUMNS * Defaults::Playfield::SUBDIVISIONS;
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const int SUB_HORIZ = Defaults::Playfield::ROWS * Defaults::Playfield::SUBDIVISIONS;
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std::vector<Line> verticals;
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std::vector<Line> horizontals;
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// Verticals: posicions i ∈ [1, SUB_VERTS-1]. Si i % SUBDIVISIONS == 0 → línia
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// de la graella principal; si no, sub-graella.
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for (int i = 1; i < SUB_VERTS; i++) {
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const float X = zona.x + (static_cast<float>(i) * SUB_W);
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const bool IS_MAIN = (i % Defaults::Playfield::SUBDIVISIONS) == 0;
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const float BRIGHTNESS = IS_MAIN
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? Defaults::Playfield::GRID_BRIGHTNESS
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: Defaults::Playfield::SUBGRID_BRIGHTNESS;
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verticals.push_back(Line{
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.start = {.x = X, .y = zona.y},
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.end = {.x = X, .y = zona.y + zona.h},
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.brightness = BRIGHTNESS,
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.slot = 0});
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}
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// Horitzontals: posicions j ∈ [1, SUB_HORIZ-1]. Mateix criteri main/sub.
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for (int j = 1; j < SUB_HORIZ; j++) {
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const float Y = zona.y + (static_cast<float>(j) * SUB_H);
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const bool IS_MAIN = (j % Defaults::Playfield::SUBDIVISIONS) == 0;
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const float BRIGHTNESS = IS_MAIN
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? Defaults::Playfield::GRID_BRIGHTNESS
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: Defaults::Playfield::SUBGRID_BRIGHTNESS;
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horizontals.push_back(Line{
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.start = {.x = zona.x, .y = Y},
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.end = {.x = zona.x + zona.w, .y = Y},
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.brightness = BRIGHTNESS,
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.slot = 0});
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}
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// Verticals ja venen ordenats per x ascendent (loop sobre i). Assignem slots 0..N-1.
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// Horitzontals ja venen ordenats per y ascendent. Assignem slots N..total-1.
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lines_.clear();
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lines_.reserve(verticals.size() + horizontals.size());
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int slot = 0;
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for (auto& line : verticals) {
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line.slot = slot++;
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lines_.push_back(line);
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}
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for (auto& line : horizontals) {
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line.slot = slot++;
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lines_.push_back(line);
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}
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}
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auto Playfield::computeLineProgress(int slot) const -> float {
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const float LINE_START = static_cast<float>(slot) * spawn_interval_s_;
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const float LINE_ELAPSED = elapsed_s_ - LINE_START;
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return std::clamp(LINE_ELAPSED / Defaults::Playfield::LINE_GROWTH_DURATION_S, 0.0F, 1.0F);
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}
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void Playfield::draw() const {
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for (const auto& line : lines_) {
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const float P = computeLineProgress(line.slot);
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if (P <= 0.0F) {
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continue;
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}
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const float END_X = line.start.x + ((line.end.x - line.start.x) * P);
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const float END_Y = line.start.y + ((line.end.y - line.start.y) * P);
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Rendering::linea(
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renderer_,
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static_cast<int>(line.start.x),
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static_cast<int>(line.start.y),
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static_cast<int>(END_X),
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static_cast<int>(END_Y),
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line.brightness);
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}
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}
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} // namespace Graphics
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