Gaël
9bb9797271
Also fixed: * flying wands not pathing properly. * Lantern particles offset * Wand fire offset * Water spray from flask
43 lines
1.9 KiB
C++
43 lines
1.9 KiB
C++
#pragma once
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#include "entity/material_mix.h"
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#include "core/materials.h"
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namespace ng {
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struct PotionSpray {
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double speed = 1, minimum = .5;
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bool bunch = false, skip_static = false, leak_gas = false;
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int count = 5;
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};
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// 00bfdd10: one attempt per material, or throw_how_many on the initial press.
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// Velocities are pixels/second here; the GPU transport converts to pixels/tick.
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template<class Random, class Emit>
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int potion_spray(std::vector<MixPart>& parts, const MaterialDb& db, const PotionSpray& cfg,
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double capacity, double aim_x, double aim_y, double holder_vx,
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bool pressed, Random random, Emit emit) {
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if (capacity <= 0 || (cfg.bunch && !pressed)) return 0;
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int attempts = 0;
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for (auto& part : parts) {
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if (part.n <= 0 || (cfg.bunch && (int)part.n <= 0)) continue;
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const Material* m = db.find(part.mat);
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if (!m) continue;
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if (!cfg.bunch && cfg.skip_static && (m->type == CellType::Solid ||
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(m->type == CellType::Liquid && attr_int(*m, "liquid_static", 0)))) continue;
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const double speed = cfg.speed * std::max(cfg.minimum, std::max(1, (int)part.n) / capacity);
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const int count = cfg.bunch ? std::max(0, cfg.count) : 1;
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for (int i = 0; i < count && part.n > 0; ++i) {
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const double angle = (random() * 2 - 1) * (cfg.bunch ? .25 : .05);
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const double c = std::cos(angle), s = std::sin(angle), length = std::hypot(aim_x, aim_y);
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double vx = length > 0 ? (aim_x * c - aim_y * s) / length * speed : 0;
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double vy = length > 0 ? (aim_x * s + aim_y * c) / length * speed : 0;
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vx += holder_vx;
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if (!cfg.bunch && cfg.leak_gas && m->type == CellType::Gas) { vx = 0; vy = -10; }
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emit(*m, vx, vy);
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part.n -= 1; // Native spends contents even when the particle pool is full.
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++attempts;
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}
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}
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return attempts;
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}
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} // namespace ng
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