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Per-layer tinting and scaling

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This commit is contained in:
Shylie 2024-05-16 23:51:45 -05:00
parent 325ef5167d
commit e3a65072d8
5 changed files with 175 additions and 64 deletions
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24
examples/basic.cpp
View File

@ -6,15 +6,15 @@ namespace
{
void init()
{
glerminal_update_sprite(0xFF00007F, {
0x00FF007F, 0x00FF007F, 0x00FF007F, 0x00FF007F, 0x00FF007F, 0x00FF007F, 0x00FF007F, 0x00FF007F,
0x00FF007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0x00FF007F,
0x00FF007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0x00FF007F,
0x00FF007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0x00FF007F,
0x00FF007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0x00FF007F,
0x00FF007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0x00FF007F,
0x00FF007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0xFF00007F, 0x00FF007F,
0x00FF007F, 0x00FF007F, 0x00FF007F, 0x00FF007F, 0x00FF007F, 0x00FF007F, 0x00FF007F, 0x00FF007F
glerminal_update_sprite(1, {
0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x500000FF, 0x5000FF00,
0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00, 0x5000FF00
});
}
@ -37,10 +37,10 @@ namespace
{
for (int j = 0; j < 25; j++)
{
for (int k = 0; k < 8; k++)
for (int k = 0; k < 256; k++)
{
glerminal_set(i, j, k, rand() % 2);
glerminal_offset(i, j, k, (rand() * rand()) % 100 - 50, (rand() * rand()) % 100 - 50);
glerminal_set(i, j, k, rand() % 8 == 0);
glerminal_offset(i, j, k, (rand() * rand()) % 64 - 32, (rand() * rand()) % 64 - 32);
}
}
}

56
examples/towers.cpp
View File

@ -7,34 +7,25 @@ namespace
{
void init()
{
for (int i = 1; i < 256; i++)
glerminal_update_sprite(1,
{
constexpr unsigned char c = 16;
const unsigned char v = (255 - c) * powf((i - 1) / 256.0f, 4.0f) + c;
const unsigned int j = (0xFF << 24) | (v << 16) | (v << 8) | v;
glerminal_update_sprite(i,
{
j,j,j,j,j,j,j,j,
j,j,j,j,j,j,j,j,
j,j,j,j,j,j,j,j,
j,j,j,j,j,j,j,j,
j,j,j,j,j,j,j,j,
j,j,j,j,j,j,j,j,
j,j,j,j,j,j,j,j,
j,j,j,j,j,j,j,j,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,0xFFFFFFFF,
});
}
for (int i = 0; i < 40; i++)
for (int i = 0; i < 256; i++)
{
for (int j = 0; j < 25; j++)
{
const int c = rand() % 224 + 32;
for (int k = 0; k < c; k++)
{
glerminal_set(i, j, k, k);
}
}
constexpr unsigned char c = 32;
const unsigned char v = (255 - c) * powf((i - 1) / 256.0f, 2.0f) + c;
const unsigned int j = (0xFF << 24) | (v << 16) | (v << 8) | v;
glerminal_layer_color(i, j);
glerminal_layer_scale(i, i / 256.0f + 1);
}
}
@ -44,7 +35,7 @@ namespace
time += dt;
if (time < 1.0f)
if (time < 0.15f)
{
return;
}
@ -60,11 +51,20 @@ namespace
{
for (int j = 0; j < 25; j++)
{
const int c = rand() % 224 + 32;
for (int k = 0; k < 256; k++)
{
const float ox = 0.025f * powf(k, 0.8f) * (i - cx);
const float oy = 0.025f * powf(k, 0.8f) * (j - cy);
glerminal_offset(i, j, k, ox, oy);
if (k < c)
{
glerminal_set(i, j, k, 1);
const float ox = 0.01f * k * (i - cx);
const float oy = 0.01f * k * (j - cy);
glerminal_offset(i, j, k, ox + (1 + 0.004f * k) * cosf(c * i + k * 6.28f / 128.0f), oy + (1 + 0.004f * k) * sinf(c * j + k * 6.28f / 128.0f));
}
else
{
glerminal_set(i, j, k, 0);
}
}
}
}

13
include/glerminal.h
View File

@ -58,6 +58,19 @@ unsigned char glerminal_get(unsigned char x, unsigned char y, unsigned char laye
*/
void glerminal_offset(unsigned char x, unsigned char y, unsigned char layer, float x_offset, float y_offset);
/**
* @brief Set a layer's color
* @param layer The layer to modify
* @param color The new color
*/
void glerminal_layer_color(unsigned char layer, unsigned int color);
/**
* @brief Set a layer's scale
* @param layer The layer to modify
* @param scale The new scale
*/
void glerminal_layer_scale(unsigned char layer, float scale);
/**
* @brief Upload sprite to the given sprite ID
* @param id The ID of the sprite to change

22
source/glerminal-private.h
View File

@ -41,30 +41,46 @@ namespace glerminal
void set(unsigned char x, unsigned char y, unsigned char layer, unsigned char sprite);
unsigned char get(unsigned char x, unsigned char y, unsigned char layer) const;
void offset(unsigned char x, unsigned char y, unsigned char layer, float x_offset, float y_offset);
void layer_color(unsigned char layer, unsigned int color);
void layer_scale(unsigned char layer, float scale);
void update_sprite(unsigned char id, glerminal_sprite sprite);
private:
// glfw data
GLFWwindow* m_window;
// opengl handles
unsigned int m_vbo;
unsigned int m_sprites_instance_vbo;
unsigned int m_offsets_instance_vbo;
unsigned int m_vao;
unsigned int m_program;
unsigned int m_screen_vao;
unsigned int m_program;
unsigned int m_screen_program;
unsigned int m_sprites_texture;
unsigned int m_framebuffer;
unsigned int m_framebuffer_backing_texture;
unsigned int m_layer_colors_buffer;
unsigned int m_layer_scales_buffer;
unsigned int m_screen_size_uniform_location;
unsigned int m_palette_uniform_location;
// per-cell data
unsigned char m_cells[GRID_AREA * LAYER_COUNT];
float m_offsets[GRID_AREA * LAYER_COUNT * 2];
unsigned int m_sprites[CELL_SIZE * CELL_SIZE * 256];
// per-layer data
float m_layer_colors[LAYER_COUNT * 4];
float m_layer_scales[LAYER_COUNT];
// library state
unsigned int m_sprites[CELL_SIZE * CELL_SIZE * (1 << (8 * sizeof(*m_cells)))];
glerminal_main_cb m_main;
#ifdef _DEBUG
@ -79,6 +95,8 @@ namespace glerminal
void deinit_gl();
void update_sprites();
void update_layer_colors();
void update_layer_scales();
};
}

118
source/glerminal.cpp
View File

@ -22,7 +22,7 @@ namespace
};
constexpr char* VERTEX_SHADER_SOURCE =
"#version 400 core\n"
"#version 460 core\n"
"layout (location = 0) in vec2 position;\n"
"layout (location = 1) in vec2 offset;\n"
"layout (location = 2) in int sprite;\n"
@ -45,7 +45,7 @@ namespace
"}";
constexpr char* GEOMETRY_SHADER_SOURCE =
"#version 400 core\n"
"#version 460 core\n"
"layout (triangles) in;\n"
"layout (triangle_strip, max_vertices = 3) out;\n"
"in VS_OUT {\n"
@ -55,21 +55,25 @@ namespace
" vec2 texcoord;\n"
"} gs_in[];\n"
"flat out int sprite;\n"
"layout (std430, binding = 0) buffer LayerScales"
"{\n"
" float scales[];\n"
"} lss;\n"
"out vec2 texcoord;\n"
"void main()\n"
"{\n"
" gl_Layer = gs_in[0].layer;\n"
" gl_Position = vec4(gl_in[0].gl_Position.xy + gs_in[0].offset, 0, 1);\n"
" gl_Position = vec4(gl_in[0].gl_Position.xy * lss.scales[gs_in[0].layer] + gs_in[0].offset, 0, 1);\n"
" sprite = gs_in[0].sprite;\n"
" texcoord = gs_in[0].texcoord;\n"
" EmitVertex();\n"
" gl_Layer = gs_in[1].layer;\n"
" gl_Position = vec4(gl_in[1].gl_Position.xy + gs_in[1].offset, 0, 1);\n"
" gl_Position = vec4(gl_in[1].gl_Position.xy * lss.scales[gs_in[1].layer] + gs_in[1].offset, 0, 1);\n"
" sprite = gs_in[1].sprite;\n"
" texcoord = gs_in[1].texcoord;\n"
" EmitVertex();\n"
" gl_Layer = gs_in[2].layer;\n"
" gl_Position = vec4(gl_in[2].gl_Position.xy + gs_in[2].offset, 0, 1);\n"
" gl_Position = vec4(gl_in[2].gl_Position.xy * lss.scales[gs_in[2].layer] + gs_in[2].offset, 0, 1);\n"
" sprite = gs_in[2].sprite;\n"
" texcoord = gs_in[2].texcoord;\n"
" EmitVertex();\n"
@ -77,10 +81,10 @@ namespace
"}";
constexpr char* FRAGMENT_SHADER_SOURCE =
"#version 400 core\n"
"#version 460 core\n"
"in vec2 texcoord;\n"
"flat in int sprite;\n"
"uniform sampler2DArray " SPRITES_UNIFORM_NAME ";\n"
"layout (binding = 0) uniform sampler2DArray " SPRITES_UNIFORM_NAME ";\n"
"out vec4 FragColor;\n"
"void main()\n"
"{\n"
@ -88,7 +92,7 @@ namespace
"}";
constexpr char* SCREEN_VERTEX_SHADER_SOURCE =
"#version 400 core\n"
"#version 460 core\n"
"layout (location = 0) in vec2 position;\n"
"out vec2 texcoord;\n"
"void main()\n"
@ -98,16 +102,20 @@ namespace
"}";
constexpr char* SCREEN_FRAGMENT_SHADER_SOURCE =
"#version 400 core\n"
"#version 460 core\n"
"in vec2 texcoord;\n"
"uniform sampler2DArray " LAYERS_UNIFORM_NAME ";\n"
"layout (binding = 1) uniform sampler2DArray " LAYERS_UNIFORM_NAME ";\n"
"layout (std430, binding = 1) buffer LayerColors"
"{\n"
" vec4 colors[];\n"
"} lcs;\n"
"out vec4 FragColor;\n"
"void main()\n"
"{\n"
" vec3 current_color = vec3(0);\n"
" for (int i = 0; i < 256; i++)\n"
" {\n"
" vec4 texsample = texture(" LAYERS_UNIFORM_NAME ", vec3(texcoord, i));\n"
" vec4 texsample = lcs.colors[i] * texture(" LAYERS_UNIFORM_NAME ", vec3(texcoord, i));\n"
" current_color = mix(current_color, texsample.rgb, texsample.a);\n"
" }\n"
" FragColor = vec4(current_color, 1);\n"
@ -120,7 +128,9 @@ namespace glerminal
m_main(main),
m_cells{ },
m_offsets{ },
m_sprites{ }
m_sprites{ },
m_layer_colors{ },
m_layer_scales{ }
#ifdef _DEBUG
, m_log("log.txt")
#endif
@ -141,6 +151,12 @@ namespace glerminal
throw std::runtime_error("No main callback provided.");
}
for (int i = 0; i < LAYER_COUNT; i++)
{
m_layer_colors[i * 4 + 0] = m_layer_colors[i * 4 + 1] = m_layer_colors[i * 4 + 2] = m_layer_colors[i * 4 + 3] = 1;
m_layer_scales[i] = 1;
}
init_glfw();
init_gl();
@ -174,14 +190,14 @@ namespace glerminal
void glerminal::flush()
{
// use dirty flag later
glNamedBufferData(m_sprites_instance_vbo, sizeof(m_cells), m_cells, GL_STREAM_DRAW);
glNamedBufferData(m_offsets_instance_vbo, sizeof(m_offsets), m_offsets, GL_STREAM_DRAW);
update_sprites();
update_layer_colors();
update_layer_scales();
glViewport(0, 0, GRID_WIDTH * CELL_SIZE, GRID_HEIGHT * CELL_SIZE);
glUseProgram(m_program);
glBindTexture(GL_TEXTURE_2D_ARRAY, m_sprites_texture);
glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer);
glBindVertexArray(m_vao);
glClear(GL_COLOR_BUFFER_BIT);
@ -189,7 +205,6 @@ namespace glerminal
glViewport(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
glUseProgram(m_screen_program);
glBindTexture(GL_TEXTURE_2D_ARRAY, m_framebuffer_backing_texture);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glBindVertexArray(m_screen_vao);
glClear(GL_COLOR_BUFFER_BIT);
@ -227,6 +242,19 @@ namespace glerminal
}
}
void glerminal::layer_color(unsigned char layer, unsigned int color)
{
m_layer_colors[layer * 4 + 0] = ((color >> 0) & 0xFF) / 255.0f;
m_layer_colors[layer * 4 + 1] = ((color >> 8) & 0xFF) / 255.0f;
m_layer_colors[layer * 4 + 2] = ((color >> 16) & 0xFF) / 255.0f;
m_layer_colors[layer * 4 + 3] = ((color >> 24) & 0xFF) / 255.0f;
}
void glerminal::layer_scale(unsigned char layer, float scale)
{
m_layer_scales[layer] = scale;
}
void glerminal::update_sprite(unsigned char id, glerminal_sprite sprite)
{
// does this work?
@ -342,6 +370,8 @@ namespace glerminal
glGenBuffers(1, &m_vbo);
glGenBuffers(1, &m_sprites_instance_vbo);
glGenBuffers(1, &m_offsets_instance_vbo);
glGenBuffers(1, &m_layer_colors_buffer);
glGenBuffers(1, &m_layer_scales_buffer);
// create vertex array object
glGenVertexArrays(1, &m_vao);
@ -374,6 +404,16 @@ namespace glerminal
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(*VBO_VERTICES), reinterpret_cast<void*>(0));
glBindVertexArray(0);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_layer_scales_buffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(m_layer_scales), m_layer_scales, GL_DYNAMIC_READ);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, m_layer_scales_buffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_layer_colors_buffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(m_layer_colors), m_layer_colors, GL_DYNAMIC_READ);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, m_layer_colors_buffer);
// -- setup shader program --
// compile
const unsigned int vertex_shader = glCreateShader(GL_VERTEX_SHADER);
@ -388,12 +428,16 @@ namespace glerminal
glShaderSource(fragment_shader, 1, &FRAGMENT_SHADER_SOURCE, nullptr);
glCompileShader(fragment_shader);
constexpr int INFO_LOG_SIZE = 512;
int success;
char info_log[INFO_LOG_SIZE];
// verify compile
glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &success);
if (!success)
{
glGetShaderInfoLog(vertex_shader, INFO_LOG_SIZE, nullptr, info_log);
glDeleteShader(vertex_shader);
glDeleteShader(geometry_shader);
glDeleteShader(fragment_shader);
@ -404,6 +448,8 @@ namespace glerminal
glGetShaderiv(geometry_shader, GL_COMPILE_STATUS, &success);
if (!success)
{
glGetShaderInfoLog(geometry_shader, INFO_LOG_SIZE, nullptr, info_log);
glDeleteShader(vertex_shader);
glDeleteShader(geometry_shader);
glDeleteShader(fragment_shader);
@ -414,6 +460,8 @@ namespace glerminal
glGetShaderiv(fragment_shader, GL_COMPILE_STATUS, &success);
if (!success)
{
glGetShaderInfoLog(fragment_shader, INFO_LOG_SIZE, nullptr, info_log);
glDeleteShader(vertex_shader);
glDeleteShader(geometry_shader);
glDeleteShader(fragment_shader);
@ -446,8 +494,6 @@ namespace glerminal
glUseProgram(m_program);
glUniform4f(m_screen_size_uniform_location, GRID_WIDTH, GRID_HEIGHT, 1.0f / GRID_WIDTH, 1.0f / GRID_HEIGHT);
glUniform1i(glGetUniformLocation(m_program, SPRITES_UNIFORM_NAME), 0);
// compile
const unsigned int screen_vertex_shader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(screen_vertex_shader, 1, &SCREEN_VERTEX_SHADER_SOURCE, nullptr);
@ -461,6 +507,8 @@ namespace glerminal
glGetShaderiv(screen_vertex_shader, GL_COMPILE_STATUS, &success);
if (!success)
{
glGetShaderInfoLog(screen_vertex_shader, INFO_LOG_SIZE, 0, info_log);
glDeleteShader(screen_vertex_shader);
glDeleteShader(screen_fragment_shader);
@ -470,6 +518,8 @@ namespace glerminal
glGetShaderiv(screen_fragment_shader, GL_COMPILE_STATUS, &success);
if (!success)
{
glGetShaderInfoLog(screen_fragment_shader, INFO_LOG_SIZE, 0, info_log);
glDeleteShader(screen_vertex_shader);
glDeleteShader(screen_fragment_shader);
@ -510,6 +560,8 @@ namespace glerminal
update_sprites();
glBindTextureUnit(0, m_sprites_texture);
// -- setup framebuffer --
glGenFramebuffers(1, &m_framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer);
@ -526,9 +578,11 @@ namespace glerminal
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAX_LEVEL, 0);
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA, GRID_WIDTH * CELL_SIZE, GRID_HEIGHT * CELL_SIZE, LAYER_COUNT, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, GL_RGBA8, GRID_WIDTH * CELL_SIZE, GRID_HEIGHT * CELL_SIZE, LAYER_COUNT);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, m_framebuffer_backing_texture, 0);
glBindTextureUnit(1, m_framebuffer_backing_texture);
// setup uniforms for screen shader
glUseProgram(m_screen_program);
}
@ -550,13 +604,25 @@ namespace glerminal
glDeleteBuffers(1, &m_vbo);
glDeleteBuffers(1, &m_sprites_instance_vbo);
glDeleteBuffers(1, &m_offsets_instance_vbo);
glDeleteBuffers(1, &m_layer_colors_buffer);
glDeleteBuffers(1, &m_layer_scales_buffer);
glDeleteProgram(m_program);
}
void glerminal::update_sprites()
{
glBindTexture(GL_TEXTURE_2D_ARRAY, m_sprites_texture);
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA, CELL_SIZE, CELL_SIZE, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_sprites);
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA8, CELL_SIZE, CELL_SIZE, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_sprites);
}
void glerminal::update_layer_colors()
{
glNamedBufferData(m_layer_colors_buffer, sizeof(m_layer_colors), m_layer_colors, GL_DYNAMIC_READ);
}
void glerminal::update_layer_scales()
{
glNamedBufferData(m_layer_scales_buffer, sizeof(m_layer_scales), m_layer_scales, GL_DYNAMIC_READ);
}
}
@ -602,6 +668,20 @@ void glerminal_offset(unsigned char x, unsigned char y, unsigned char layer, flo
GLERMINAL_G->offset(x, y, layer, x_offset, y_offset);
}
void glerminal_layer_color(unsigned char layer, unsigned int color)
{
if (!GLERMINAL_G) { return; }
GLERMINAL_G->layer_color(layer, color);
}
void glerminal_layer_scale(unsigned char layer, float scale)
{
if (!GLERMINAL_G) { return; }
GLERMINAL_G->layer_scale(layer, scale);
}
void glerminal_update_sprite(unsigned char id, glerminal_sprite sprite)
{
if (!GLERMINAL_G) { return; }