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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "Stars.h"
#include <sage/GL.h>
#include <wfmath/vector.h>
#include <wfmath/MersenneTwister.h>
namespace Sear {
Stars::Stars()
{
m_locations = new Vertex_3[1000];
m_colors = new Color_4[1000];
WFMath::MTRand twister;
for (unsigned int S=0; S < 1000; ++S) {
WFMath::Vector<3> dir(twister.rand(), twister.rand(), twister.rand());
dir -= WFMath::Vector<3>(0.5, 0.5, 0.5);
dir = dir.normalize() * 100;
m_locations[S].x = dir.x();
m_locations[S].y = dir.y();
m_locations[S].z = dir.z();
m_colors[S].r = twister.randInt(128) + 128;
m_colors[S].g = m_colors[S].b = m_colors[S].r; // always white for now
m_colors[S].a = 0xff;
}
}
Stars::~Stars()
{
delete[] m_locations;
delete[] m_colors;
}
void Stars::render()
{
glDepthMask(GL_FALSE);
glEnableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
glColorPointer(4, GL_UNSIGNED_BYTE, 0, m_colors);
glVertexPointer(3, GL_FLOAT, 0, m_locations);
glDrawArrays(GL_POINTS, 0, 1000);
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glDepthMask(GL_TRUE);
}
} // of namespace Sear
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