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@ -1,372 +0,0 @@ |
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/*
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* Copyright (C) 2023 Christopher J. Howard |
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* |
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* This file is part of Antkeeper source code. |
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* |
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* Antkeeper source code is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* Antkeeper source code is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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#include "painting.hpp"
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#include "game/component/transform.hpp"
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#include "game/component/brush.hpp"
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#include "game/component/tool.hpp"
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#include "event/event-dispatcher.hpp"
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#include "resources/resource-manager.hpp"
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#include "render/material.hpp"
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#include "render/model.hpp"
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#include "utility/fundamental-types.hpp"
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#include "entity/commands.hpp"
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#include "game/component/collision.hpp"
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#include "game/component/transform.hpp"
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#include "gl/vertex-buffer.hpp"
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#include "render/vertex-attribute.hpp"
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#include "geom/mesh-functions.hpp"
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#include <limits>
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namespace game { |
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namespace system { |
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painting::painting(entity::registry& registry, ::event_dispatcher* event_dispatcher, ::resource_manager* resource_manager): |
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updatable(registry), |
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event_dispatcher(event_dispatcher), |
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resource_manager(resource_manager), |
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scene_collection(nullptr), |
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is_painting(false) |
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{ |
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/*
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event_dispatcher->subscribe<tool_pressed_event>(this); |
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event_dispatcher->subscribe<tool_released_event>(this); |
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max_miter_angle = math::radians(135.0f); |
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decal_offset = 0.01f; |
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stroke_width = 1.5f; |
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min_stroke_length = 1.0f; |
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min_stroke_length_squared = min_stroke_length * min_stroke_length; |
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max_stroke_segments = 4096; |
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current_stroke_segment = 0; |
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vertex_size = 13; |
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vertex_stride = sizeof(float) * vertex_size; |
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vertex_count = max_stroke_segments * 6; |
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// Create stroke model
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stroke_model = new model(); |
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stroke_model_group = stroke_model->add_group(); |
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stroke_model_group->set_material(resource_manager->load<material>("brushstroke.mtl")); |
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// Setup stroke vbo and vao
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stroke_vbo = stroke_model->get_vertex_buffer(); |
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stroke_vbo->repurpose(gl::buffer_usage::dynamic_draw, sizeof(float) * vertex_size * vertex_count, nullptr); |
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stroke_model->get_vertex_array()->bind_attribute(VERTEX_POSITION_LOCATION, *stroke_vbo, 4, gl::vertex_attribute_type::float_32, vertex_stride, 0); |
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stroke_model->get_vertex_array()->bind_attribute(VERTEX_NORMAL_LOCATION, *stroke_vbo, 3, gl::vertex_attribute_type::float_32, vertex_stride, sizeof(float) * 4); |
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stroke_model->get_vertex_array()->bind_attribute(VERTEX_TEXCOORD_LOCATION, *stroke_vbo, 2, gl::vertex_attribute_type::float_32, vertex_stride, sizeof(float) * 7); |
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stroke_model->get_vertex_array()->bind_attribute(VERTEX_TANGENT_LOCATION, *stroke_vbo, 4, gl::vertex_attribute_type::float_32, vertex_stride, sizeof(float) * 9); |
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// Create stroke model instance
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stroke_model_instance = new scene::model_instance(); |
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stroke_model_instance->set_model(stroke_model); |
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stroke_model_instance->update_tweens(); |
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stroke_bounds_min.x() = std::numeric_limits<float>::infinity(); |
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stroke_bounds_min.y() = std::numeric_limits<float>::infinity(); |
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stroke_bounds_min.z() = std::numeric_limits<float>::infinity(); |
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stroke_bounds_max.x() = -std::numeric_limits<float>::infinity(); |
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stroke_bounds_max.y() = -std::numeric_limits<float>::infinity(); |
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stroke_bounds_max.z() = -std::numeric_limits<float>::infinity(); |
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midstroke = false; |
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*/ |
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} |
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painting::~painting() |
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{ |
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/*
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event_dispatcher->unsubscribe<tool_pressed_event>(this); |
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event_dispatcher->unsubscribe<tool_released_event>(this); |
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*/ |
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} |
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void painting::update(double t, double dt) |
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{ |
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/*
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if (is_painting) |
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{ |
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const component::tool& tool = registry.get<component::tool>(brush_entity); |
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auto cast_result = cast_ray(tool.cursor); |
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if (cast_result.has_value()) |
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{ |
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stroke_end = std::get<0>(cast_result.value()); |
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float3 surface_normal = std::get<1>(cast_result.value()); |
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float3 segment_difference = stroke_end - stroke_start; |
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float segment_length_squared = math::dot(segment_difference, segment_difference); |
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if (segment_length_squared >= min_stroke_length_squared) |
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{ |
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float segment_length = std::sqrt(segment_length_squared); |
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float3 segment_forward = segment_difference / segment_length; |
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float3 segment_right = math::normalize(math::cross(segment_forward, surface_normal)); |
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float3 segment_up = math::cross(segment_right, segment_forward); |
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float angle = std::acos(math::dot(segment_forward, float3{0, 0, -1})); |
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float3 cross = math::cross(segment_forward, float3{0, 0, -1}); |
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if (math::dot(surface_normal, cross) < 0.0f) |
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angle = -angle; |
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math::quaternion<float> tangent_rotation = math::normalize(math::angle_axis(-angle, surface_normal)); |
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float3 p1 = stroke_start; |
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float3 p2 = stroke_end; |
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// Find miter
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float3 tangent = math::normalize(math::normalize(p2 - p1) + math::normalize(p1 - p0)); |
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float2 miter = float2{-tangent.z(), tangent.x()}; |
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float2 normal = float2{segment_right.x(), segment_right.z()}; |
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float miter_length = stroke_width / math::dot(miter, normal); |
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float3 a = p0a; |
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float3 b = p0b; |
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float3 c = p1 - segment_right * stroke_width * 0.5f + segment_up * decal_offset; |
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float3 d = p1 + segment_right * stroke_width * 0.5f + segment_up * decal_offset; |
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float3 e = p2 - segment_right * stroke_width * 0.5f + segment_up * decal_offset; |
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float3 f = p2 + segment_right * stroke_width * 0.5f + segment_up * decal_offset; |
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// Adjust c and d
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bool mitered = false; |
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if (midstroke) |
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{ |
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float angle = std::acos(math::dot(math::normalize(p2 - p1), math::normalize(p1 - p0))); |
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if (angle < max_miter_angle) |
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{ |
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mitered = true; |
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c = p1 - float3{miter.x(), 0.0f, miter.y()} * miter_length * 0.5f + segment_up * decal_offset; |
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d = p1 + float3{miter.x(), 0.0f, miter.y()} * miter_length * 0.5f + segment_up * decal_offset; |
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} |
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} |
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const float3 positions[] = |
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{ |
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a, b, c, |
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c, b, d, |
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c, d, e, |
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e, d, f |
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}; |
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const float w = static_cast<float>(t); |
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float2 texcoords[] = |
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{ |
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{0, 0}, {1, 0}, {0, 1}, |
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{0, 1}, {1, 0}, {1, 1}, |
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{0, 0}, {1, 0}, {0, 1}, |
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{0, 1}, {1, 0}, {1, 1}, |
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}; |
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float3 tangent_positions[] = |
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{ |
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{0, 0, 0}, {1, 0, 0}, {0, 0, 1}, |
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{0, 0, 1}, {1, 0, 0}, {1, 0, 1}, |
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{0, 0, 0}, {1, 0, 0}, {0, 0, 1}, |
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{0, 0, 1}, {1, 0, 0}, {1, 0, 1} |
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}; |
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/// @TODO: smooth normals in middle of segment
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float4 tangents[12]; |
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for (int i = 0; i < 4; ++i) |
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{ |
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const float3& a = tangent_positions[i * 3]; |
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const float3& b = tangent_positions[i * 3 + 1]; |
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const float3& c = tangent_positions[i * 3 + 2]; |
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const float2& uva = texcoords[i * 3]; |
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const float2& uvb = texcoords[i * 3 + 1]; |
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const float2& uvc = texcoords[i * 3 + 2]; |
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float3 ba = b - a; |
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float3 ca = c - a; |
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float2 uvba = uvb - uva; |
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float2 uvca = uvc - uva; |
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float f = 1.0f / (uvba.x() * uvca.y() - uvca.x() * uvba.y()); |
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float3 tangent = math::normalize((ba * uvca.y() - ca * uvba.y()) * f); |
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float3 bitangent = math::normalize((ba * -uvca.x() + ca * uvba.x()) * f); |
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// Rotate tangent and bitangent according to segment rotation
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tangent = math::normalize(tangent_rotation * tangent); |
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bitangent = math::normalize(tangent_rotation * bitangent); |
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// Calculate sign of bitangent
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float bitangent_sign = (math::dot(math::cross(surface_normal, tangent), bitangent) < 0.0f) ? -1.0f : 1.0f; |
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tangents[i * 3] = {tangent.x(), tangent.y(), tangent.z(), bitangent_sign}; |
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tangents[i * 3 + 1] = {tangent.x(), tangent.y(), tangent.z(), bitangent_sign}; |
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tangents[i * 3 + 2] = {tangent.x(), tangent.y(), tangent.z(), bitangent_sign}; |
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} |
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float vertex_data[13 * 12]; |
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float* v = &vertex_data[0]; |
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for (int i = 0; i < 12; ++i) |
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{ |
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*(v++) = positions[i].x(); |
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*(v++) = positions[i].y(); |
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*(v++) = positions[i].z(); |
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*(v++) = w; |
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*(v++) = surface_normal.x(); |
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*(v++) = surface_normal.y(); |
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*(v++) = surface_normal.z(); |
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*(v++) = texcoords[i].x(); |
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*(v++) = texcoords[i].y(); |
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*(v++) = tangents[i].x(); |
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*(v++) = tangents[i].y(); |
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*(v++) = tangents[i].z(); |
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*(v++) = tangents[i].w; |
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} |
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std::size_t segment_size = sizeof(float) * vertex_size * 6; |
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if (mitered) |
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{ |
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stroke_vbo->update((current_stroke_segment - 1) * segment_size, segment_size * 2, &vertex_data[0]); |
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} |
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else |
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{ |
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stroke_vbo->update(current_stroke_segment * segment_size, segment_size, &vertex_data[vertex_size * 6]); |
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} |
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++current_stroke_segment; |
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stroke_model_group->set_index_count(current_stroke_segment * 6); |
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// Update stroke bounds
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stroke_bounds_min.x() = std::min<float>(stroke_bounds_min.x(), std::min<float>(c.x(), std::min<float>(d.x(), std::min<float>(e.x(), f.x())))); |
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stroke_bounds_min.y() = std::min<float>(stroke_bounds_min.y(), std::min<float>(c.y(), std::min<float>(d.y(), std::min<float>(e.y(), f.y())))); |
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stroke_bounds_min.z() = std::min<float>(stroke_bounds_min.z(), std::min<float>(c.z(), std::min<float>(d.z(), std::min<float>(e.z(), f.z())))); |
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stroke_bounds_max.x() = std::max<float>(stroke_bounds_max.x(), std::max<float>(c.x(), std::max<float>(d.x(), std::max<float>(e.x(), f.x())))); |
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stroke_bounds_max.y() = std::max<float>(stroke_bounds_max.y(), std::max<float>(c.y(), std::max<float>(d.y(), std::max<float>(e.y(), f.y())))); |
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stroke_bounds_max.z() = std::max<float>(stroke_bounds_max.z(), std::max<float>(c.z(), std::max<float>(d.z(), std::max<float>(e.z(), f.z())))); |
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stroke_model->set_bounds(geom::aabb<float>{stroke_bounds_min, stroke_bounds_max}); |
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stroke_model_instance->update_bounds(); |
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p0 = stroke_start; |
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p0a = c; |
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p0b = d; |
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stroke_start = stroke_end; |
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midstroke = true; |
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} |
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} |
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} |
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*/ |
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} |
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void painting::set_scene(scene::collection* collection) |
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{ |
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/*
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this->scene_collection = collection; |
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scene_collection->add_object(stroke_model_instance); |
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*/ |
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} |
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void painting::handle_event(const tool_pressed_event& event) |
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{ |
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/*
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if (registry.has<component::brush>(event.entity_id)) |
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{ |
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auto cast_result = cast_ray(event.position); |
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if (cast_result.has_value()) |
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{ |
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brush_entity = event.entity_id; |
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is_painting = true; |
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stroke_start = std::get<0>(cast_result.value()); |
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stroke_end = stroke_start; |
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p0 = stroke_start; |
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p0a = p0; |
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p0b = p0; |
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midstroke = false; |
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} |
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} |
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*/ |
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} |
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void painting::handle_event(const tool_released_event& event) |
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{ |
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/*
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if (registry.has<component::brush>(event.entity_id)) |
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{ |
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auto cast_result = cast_ray(command::get_world_transform(registry, event.entity_id).translation); |
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if (cast_result.has_value()) |
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{ |
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stroke_end = std::get<0>(cast_result.value()); |
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} |
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brush_entity = entt::null; |
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is_painting = false; |
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} |
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*/ |
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} |
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std::optional<std::tuple<float3, float3>> painting::cast_ray(const float3& position) const |
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{ |
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std::optional<std::tuple<float3, float3>> result; |
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/*
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float3 intersection; |
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float3 surface_normal; |
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geom::mesh::face* face = nullptr; |
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geom::ray<float> untransformed_ray = {position + float3{0.0f, 10000.0f, 0.0f}, {0, -1, 0}}; |
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float min_distance = std::numeric_limits<float>::infinity(); |
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registry.view<component::transform, component::collision>().each( |
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[&](entity::id entity_id, auto& collision_transform, auto& collision) |
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{ |
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// Transform ray into local space of collision component
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math::transform<float> inverse_transform = math::inverse(collision_transform.local); |
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float3 origin = inverse_transform * untransformed_ray.origin; |
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float3 direction = math::normalize(math::conjugate(collision_transform.local.rotation) * untransformed_ray.direction); |
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geom::ray<float> transformed_ray = {origin, direction}; |
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// Broad phase AABB test
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auto aabb_result = geom::ray_aabb_intersection(transformed_ray, collision.bounds); |
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if (!std::get<0>(aabb_result)) |
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{ |
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return; |
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} |
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// Narrow phase mesh test
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auto mesh_result = collision.mesh_accelerator.query_nearest(transformed_ray); |
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if (mesh_result) |
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{ |
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if (mesh_result->t < min_distance) |
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{ |
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min_distance = mesh_result->t; |
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intersection = untransformed_ray.extrapolate(min_distance); |
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face = mesh_result->face; |
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} |
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} |
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}); |
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if (face != nullptr) |
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{ |
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surface_normal = calculate_face_normal(*face); |
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result = std::make_tuple(intersection, surface_normal); |
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} |
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*/ |
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return result; |
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} |
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} // namespace system
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} // namespace game
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