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Differential D721 Diff 19200 source/renderer/TerrainOverlay.cpp

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source/renderer/TerrainOverlay.cpp

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// To ensure that outlines are drawn on top of the terrain correctly (and // To ensure that outlines are drawn on top of the terrain correctly (and
// don't Z-fight and flicker nastily), draw them as QUADS with the LINE // don't Z-fight and flicker nastily), draw them as QUADS with the LINE
// PolygonMode, and use PolygonOffset to pull them towards the camera. // PolygonMode, and use PolygonOffset to pull them towards the camera.
// (See e.g. http://www.opengl.org/resources/faq/technical/polygonoffset.htm) // (See e.g. http://www.opengl.org/resources/faq/technical/polygonoffset.htm)
glPolygonOffset(-1.f, -1.f); glPolygonOffset(-1.f, -1.f);
//glEnable(GL_POLYGON_OFFSET_LINE); //glEnable(GL_POLYGON_OFFSET_LINE);
glEnable(GL_POLYGON_OFFSET_FILL); glEnable(GL_POLYGON_OFFSET_FILL);
pglActiveTextureARB(GL_TEXTURE0); glActiveTextureARB(GL_TEXTURE0);
StartRender(); StartRender();
ssize_t min_i, min_j, max_i, max_j; ssize_t min_i, min_j, max_i, max_j;
GetTileExtents(min_i, min_j, max_i, max_j); GetTileExtents(min_i, min_j, max_i, max_j);
// Clamp the min to 0, but the max to -1 - so tile -1 can never be rendered, // Clamp the min to 0, but the max to -1 - so tile -1 can never be rendered,
// but if unclamped_max<0 then no tiles at all will be rendered. And the same // but if unclamped_max<0 then no tiles at all will be rendered. And the same
// for the upper limit. // for the upper limit.
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void TerrainTextureOverlay::RenderAfterWater(int cullGroup) void TerrainTextureOverlay::RenderAfterWater(int cullGroup)
{ {
CTerrain* terrain = g_Game->GetWorld()->GetTerrain(); CTerrain* terrain = g_Game->GetWorld()->GetTerrain();
ssize_t w = (ssize_t)(terrain->GetTilesPerSide() * m_TexelsPerTile); ssize_t w = (ssize_t)(terrain->GetTilesPerSide() * m_TexelsPerTile);
ssize_t h = (ssize_t)(terrain->GetTilesPerSide() * m_TexelsPerTile); ssize_t h = (ssize_t)(terrain->GetTilesPerSide() * m_TexelsPerTile);
pglActiveTextureARB(GL_TEXTURE0); glActiveTextureARB(GL_TEXTURE0);
// Recreate the texture with new size if necessary // Recreate the texture with new size if necessary
if (round_up_to_pow2(w) != m_TextureW || round_up_to_pow2(h) != m_TextureH) if (round_up_to_pow2(w) != m_TextureW || round_up_to_pow2(h) != m_TextureH)
{ {
m_TextureW = round_up_to_pow2(w); m_TextureW = round_up_to_pow2(w);
m_TextureH = round_up_to_pow2(h); m_TextureH = round_up_to_pow2(h);
glBindTexture(GL_TEXTURE_2D, m_Texture); glBindTexture(GL_TEXTURE_2D, m_Texture);
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