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add abr color dynamics

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This commit is contained in:
omigamedev
2019-03-07 00:53:45 +01:00
parent 3296de98cc
commit 5329147d58
14 changed files with 78 additions and 31 deletions
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30
src/brush.cpp
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@@ -129,12 +129,6 @@ bool BrushMesh::create()
}
StrokeSample Stroke::randomize_sample(const glm::vec3& pos, float pressure, float dir_angle)
{
auto rnd_nor = [&] { return float((double)prng() / (double)prng.max()); }; // normalized [0, +1]
auto rnd_neg = [&] { return float((double)prng() / (double)prng.max() * 2.0 - 1.0); }; // normalized [-1, +1]
auto rnd_rad = [&] { return float((double)prng() / (double)prng.max() * M_PI * 2.0); }; // normalized [0, 2pi]
auto rnd_vec = [&] { float rad = rnd_rad(); return glm::vec3(cosf(rad), sinf(rad), 0); }; // normalized direction vector
auto rnd_bneg = [&] { return prng() % 2 == 0 ? -1.f : 1.f; }; // -1 or 1
float size_dyn = m_brush->m_tip_size_pressure ? pressure : 1.f;
float flow_dyn = m_brush->m_tip_flow_pressure ? pressure : 1.f;
float opacity_dyn = m_brush->m_tip_opacity_pressure ? pressure : 1.f;
@@ -162,14 +156,24 @@ StrokeSample Stroke::randomize_sample(const glm::vec3& pos, float pressure, floa
s.pos = pos + (scatter_scale * rnd_vec() * m_brush->m_jitter_scatter * s.size * 0.5f); // 0.5 because PS scatters by half size
s.flow = m_brush->m_tip_flow * (1.f - rnd_nor() * m_brush->m_jitter_flow) * flow_dyn;
s.opacity = m_brush->m_tip_opacity * (1.f - rnd_nor() * m_brush->m_jitter_opacity) * opacity_dyn;
auto hsv = convert_rgb2hsv(m_brush->m_tip_color);
hsv.x = glm::clamp(glm::mix(hsv.x, (pressure - 0.5f) * 2.0f, m_brush->m_tip_hue) + (rnd_nor() - 0.5f) * m_brush->m_jitter_hue, 0.f, 1.f);
hsv.y = glm::clamp(glm::mix(hsv.y, (1.f - pressure - 0.5f) * 2.0f, m_brush->m_tip_sat) + (rnd_nor() - 0.5f) * m_brush->m_jitter_sat, 0.f, 1.f);
hsv.z = glm::clamp(glm::mix(hsv.z, (pressure - 0.5f) * 2.0f, m_brush->m_tip_val) + (rnd_nor() - 0.5f) * m_brush->m_jitter_val, 0.f, 1.f);
auto hsv = m_tip_color;
float eachtip = m_brush->m_jitter_hsv_eachsample ? 1.f : 0.f;
hsv.x = glm::fract(glm::mix(hsv.x, (pressure - 0.5f) * 2.0f, m_brush->m_tip_hue) + (rnd_nor() - 0.5f) * m_brush->m_jitter_hue * eachtip);
hsv.y = glm::clamp(glm::mix(hsv.y, (1.f - pressure - 0.5f) * 2.0f, m_brush->m_tip_sat) + (rnd_nor() - 0.5f) * m_brush->m_jitter_sat * eachtip, 0.f, 1.f);
hsv.z = glm::clamp(glm::mix(hsv.z, (pressure - 0.5f) * 2.0f, m_brush->m_tip_val) + (rnd_nor() - 0.5f) * m_brush->m_jitter_val * eachtip, 0.f, 1.f);
m_hsv_jitter.add(hsv);
s.col = convert_hsv2rgb(m_hsv_jitter.average());
return s;
}
void Stroke::randomize_prng()
{
std::random_device rd;
prng.seed(rd());
}
std::vector<StrokeSample> Stroke::compute_samples()
{
if (m_keypoints.empty()) return {};
@@ -320,6 +324,12 @@ void Stroke::start(const std::shared_ptr<Brush>& brush)
float raw_size = glm::clamp(m_brush->m_tip_size / glm::tan(glm::radians(m_camera.fov * 0.5f)), 1.f, m_max_size);
float size = aspect_width * glm::min(m_brush->m_tip_scale.x, m_brush->m_tip_scale.y) * raw_size;
m_step = glm::max(0.5f, m_brush->m_tip_spacing * size);
auto hsv = convert_rgb2hsv(m_brush->m_tip_color);
hsv.x = glm::fract(hsv.x + (rnd_nor() - 0.5f) * m_brush->m_jitter_hue);
hsv.y = glm::clamp(hsv.y + (rnd_nor() - 0.5f) * m_brush->m_jitter_sat, 0.f, 1.f);
hsv.z = glm::clamp(hsv.z + (rnd_nor() - 0.5f) * m_brush->m_jitter_val, 0.f, 1.f);
m_tip_color = hsv;
m_direction.resize(std::max<int>(1, m_brush->m_tip_angle_smooth * 200.f / m_step));
prng.seed(0);