Michaël Lemaire
edf0d58eae
git-svn-id: https://subversion.assembla.com/svn/thunderk/paysages@321 b1fd45b6-86a6-48da-8261-f70d1f35bdcc
105 lines
3.1 KiB
C++
105 lines
3.1 KiB
C++
#include "wandererchunk.h"
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#include <math.h>
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#include <stdlib.h>
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#include <QMutex>
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#include <QImage>
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#include <QColor>
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#include <QGLWidget>
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#include "../lib_paysages/color.h"
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#include "../lib_paysages/tools.h"
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WandererChunk::WandererChunk(double x, double z, double size)
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{
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_startx = x;
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_startz = z;
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_dirty = true;
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_chunksize = size;
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_nbsubchunks = 4;
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_subchunksize = size / (double)_nbsubchunks;
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_texture = new QImage(4, 4, QImage::Format_ARGB32);
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_texture->fill(QColor(0, 200, 0));
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_texture_id = 0;
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_need_texture_upload = true;
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_heightmap = (double*)malloc(sizeof(double) * (_nbsubchunks + 1) * (_nbsubchunks + 1));
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//_heightmap[0] = _heightmap[1] = _heightmap[2] = _heightmap[3] = toolsRandom();
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}
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WandererChunk::~WandererChunk()
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{
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_lock.lock();
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delete _texture;
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free(_heightmap);
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_lock.unlock();
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}
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void WandererChunk::render(QGLWidget* widget)
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{
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_lock.lock();
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if (_need_texture_upload)
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{
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_need_texture_upload = false;
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if (_texture_id)
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{
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widget->deleteTexture(_texture_id);
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}
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_texture_id = widget->bindTexture(*_texture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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}
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glBindTexture(GL_TEXTURE_2D, _texture_id);
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double tsize = 1.0 / (double)_nbsubchunks;
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for (int j = 0; j < _nbsubchunks; j++)
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{
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glBegin(GL_QUAD_STRIP);
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for (int i = 0; i <= _nbsubchunks; i++)
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{
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glColor3f(1.0, 1.0, 1.0);
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glTexCoord2d(tsize * (double)i, 1.0 - tsize * (double)j);
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glVertex3d(_startx + _subchunksize * (double)i, _heightmap[j * (_nbsubchunks + 1) + i], _startz + _subchunksize * (double)j);
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glTexCoord2d(tsize * (double)i, 1.0 - tsize * (double)(j + 1));
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glVertex3d(_startx + _subchunksize * (double)i, _heightmap[(j + 1) * (_nbsubchunks + 1) + i], _startz + _subchunksize * (double)(j + 1));
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}
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glEnd();
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}
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_lock.unlock();
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}
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void WandererChunk::maintain(Renderer* renderer)
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{
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_lock.lock();
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if (_dirty)
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{
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_dirty = false;
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// Compute heightmap
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for (int j = 0; j <= _nbsubchunks; j++)
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{
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for (int i = 0; i <= _nbsubchunks; i++)
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{
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_heightmap[j * (_nbsubchunks + 1) + i] = renderer->getTerrainHeight(renderer, _startx + _subchunksize * (double)i, _startz + _subchunksize * (double)j);
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}
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}
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// Compute texture
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int texture_size = 4;
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double step_size = _chunksize / (double)(texture_size - 1);
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for (int j = 0; j < texture_size; j++)
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{
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for (int i = 0; i < texture_size; i++)
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{
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Vector3 location = {_startx + step_size * (double)i, 0.0, _startz + step_size * (double)j};
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Color color = renderer->applyTextures(renderer, location, step_size);
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_texture->setPixel(i, j, colorTo32BitRGBA(&color));
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}
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}
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_need_texture_upload = true;
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}
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_lock.unlock();
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}
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