100 lines
2.3 KiB
C++
100 lines
2.3 KiB
C++
#pragma once
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#include "rtt.h"
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#include "shader.h"
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NS_START
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class Brush
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{
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public:
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int id = 0;
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std::string m_name;
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uint16_t m_tex_id = 0;
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glm::vec4 m_tip_color{1, 0, 0, 1};
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float m_tip_size = 0;
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float m_tip_spacing = 0;
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float m_tip_flow = 0;
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float m_tip_opacity = 0;
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float m_tip_angle = 0;
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float m_tip_stencil = 0;
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float m_tip_wet = 0;
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float m_tip_noise = 0;
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float m_tip_hue = 0;
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float m_tip_sat = 0;
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float m_tip_val = 0;
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bool m_tip_angle_follow = false;
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bool m_tip_flow_pressure = false;
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bool m_tip_size_pressure = false;
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bool m_tip_hue_pressure = false;
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bool m_tip_sat_pressure = false;
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bool m_tip_val_pressure = false;
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float m_jitter_scale = 0;
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float m_jitter_angle = 0;
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float m_jitter_spread = 0;
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float m_jitter_flow = 0;
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float m_jitter_hue = 0;
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float m_jitter_sat = 0;
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float m_jitter_val = 0;
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int m_blend_mode = 0;
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};
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struct StrokeSample
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{
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glm::vec3 col = { 0, 0, 0 };
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glm::vec2 pos = { 0, 0 };
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glm::vec2 origin = { 0,0 };
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float size = 0;
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float flow = 0;
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float angle = 0;
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};
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class BrushMesh
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{
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public:
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GLuint buffers[3]{ 0 };
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GLuint vao{ 0 };
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struct vertex_t { glm::vec4 pos; glm::vec2 uvs; };
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struct instance_t { glm::mat4 mvp; float flow; };
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int loc_flow = 0;
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int loc_mvp = 0;
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bool create();
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void draw(const std::vector<StrokeSample>& samples, const glm::mat4& proj);
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};
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class Stroke
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{
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public:
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struct Keypoint
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{
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glm::vec2 pos = { 0, 0 };
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float pressure = 0;
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float dist = 0;
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};
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struct Camera
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{
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glm::vec2 rot = { 0, 0 };
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float fov = 0;
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};
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int m_layer = 0;
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float m_curve = 0;
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float m_dist = 0;
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float m_step = 0;
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Camera m_camera;
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ui::Brush m_brush;
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cbuffer<float, 3> m_curve_angles;
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StrokeSample m_prev_sample;
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std::vector<Keypoint> m_keypoints;
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std::vector<StrokeSample> m_samples;
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int m_last_kp;
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std::minstd_rand prng;
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void start(const ui::Brush& brush);
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void add_point(glm::vec2 pos, float pressure);
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void reset(bool clear_keypoints = false);
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bool has_sample();
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std::vector<StrokeSample> compute_samples();
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StrokeSample randomize_sample(const glm::vec2& pos, float pressure, float curve_angle);
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};
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NS_END
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