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FadingLogos: add LogoParams class to keep track of multiple logos

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This commit is contained in:
Josh Holtrop 2013-12-15 18:10:35 -05:00
parent ef7e8107b6
commit 8bf3b595c3
2 changed files with 61 additions and 4 deletions
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2
src/mode.d
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@ -12,5 +12,5 @@ interface Mode
*
* @param[in] ms Elapsed milliseconds since this mode was started.
*/
public void display(ScreenSaver ss, int ms);
public void display(ScreenSaver ss, uint ms);
}

63
src/modes/fading_logos.d
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@ -1,3 +1,7 @@
import std.random : uniform;
import std.algorithm;
static import math = std.math;
import derelict.opengl3.gl3;
import gl3n.linalg;
@ -8,7 +12,25 @@ import default_shader;
class FadingLogos : Mode
{
DefaultShader m_shader;
immutable uint CREATE_DELAY = 5000;
immutable uint CHARACTER_FLY_TIME = 500;
immutable uint FADE_DELAY = 30000;
immutable uint FADE_TIME = 15000;
class LogoParams
{
uint create_time;
float c_x;
float c_y;
float rotation;
float scale;
uint character_create_time;
float character_direction;
}
protected DefaultShader m_shader;
protected LogoParams m_logos[];
protected uint m_last_create_time;
public void init(ScreenSaver ss)
{
@ -18,11 +40,13 @@ class FadingLogos : Mode
m_shader.bind();
}
public void display(ScreenSaver ss, int ms)
public void display(ScreenSaver ss, uint ms)
{
mat4 view_matrix;
update_logos(ss, ms);
glClear(GL_COLOR_BUFFER_BIT);
mat4 view_matrix;
view_matrix.make_identity();
view_matrix.scale(ss.get_height() / cast(float)ss.get_width(), 1.0, 1.0);
double scale = 0.35 * ss.get_width() * 1080.0 / (ss.get_height() * 1920.0);
@ -54,4 +78,37 @@ class FadingLogos : Mode
glUniform3fv(m_shader.color_idx, 1, color.ptr);
logo.draw(logo.WIRE, word, character, m_shader.position_idx);
}
protected void update_logos(ScreenSaver ss, uint ms)
{
const double max_scale = 0.35 * ss.get_aspect() * (1080.0 / 1920.0);
if (m_last_create_time == 0 || (ms - m_last_create_time) >= CREATE_DELAY)
{
/* time to create a new logo */
LogoParams lp = new LogoParams();
lp.create_time = ms;
lp.c_x = uniform(-0.8 * ss.get_aspect(), 0.8 * ss.get_aspect());
lp.c_y = uniform(-0.8, 0.8);
lp.rotation = uniform(0.0, math.PI * 2.0);
lp.scale = uniform(0.2 * max_scale, max_scale);
m_logos ~= lp;
}
for (uint i = 0; i < m_logos.length; )
{
if ((ms - m_logos[i].create_time) >= (FADE_DELAY + FADE_TIME))
{
/* logo has expired */
m_logos.remove(i);
}
else
{
if ((ms - m_logos[i].character_create_time) >= CHARACTER_FLY_TIME)
{
m_logos[i].character_direction = uniform(0.0, math.PI * 2.0);
}
i++;
}
}
}
}