void GL2HudRenderer::render() {
if (client->getStateId() != Client::StateId::PLAYING)
return;
const Character &character = client->getLocalCharacter();
if (!character.isValid())
return;
GL(Enable(GL_TEXTURE_2D));
vec2f texs[4];
GL2TextureManager::Entry tex_entry = renderer->getTextureManager()->get(client->getLocalCharacter().getBlock());
GL2TextureManager::getTextureCoords(tex_entry.index, tex_entry.type, texs);
GL(BindTexture(GL_TEXTURE_2D, tex_entry.tex));
GL(Color4f(1.0f, 1.0f, 1.0f, 1.0f));
GL(PushMatrix());
float d = (client->getGraphics()->getWidth() < client->getGraphics()->getHeight() ? client->getGraphics()->getWidth() : client->getGraphics()->getHeight()) * 0.05f;
GL(Translatef(-client->getGraphics()->getDrawWidth() * 0.48f, -client->getGraphics()->getDrawHeight() * 0.48f, 0));
glBegin(GL_QUADS);
glTexCoord2f(texs[0][0], texs[0][1]); glVertex2f(0, 0);
glTexCoord2f(texs[1][0], texs[1][1]); glVertex2f(d, 0);
glTexCoord2f(texs[2][0], texs[2][1]); glVertex2f(d, d);
glTexCoord2f(texs[3][0], texs[3][1]); glVertex2f(0, d);
glEnd();
LOG_OPENGL_ERROR;
GL(PopMatrix());
}
// gluLookAt implementation taken from Mesa3D
void CMatrixGLES::LookAt(GLfloat eyex, GLfloat eyey, GLfloat eyez, GLfloat centerx, GLfloat centery, GLfloat centerz, GLfloat upx, GLfloat upy, GLfloat upz)
{
GLfloat forward[3], side[3], up[3];
GLfloat m[4][4];
forward[0] = centerx - eyex;
forward[1] = centery - eyey;
forward[2] = centerz - eyez;
up[0] = upx;
up[1] = upy;
up[2] = upz;
GLfloat tmp = sqrt(forward[0]*forward[0] + forward[1]*forward[1] + forward[2]*forward[2]);
if (tmp != 0.0)
{
forward[0] /= tmp;
forward[1] /= tmp;
forward[2] /= tmp;
}
side[0] = forward[1]*up[2] - forward[2]*up[1];
side[1] = forward[2]*up[0] - forward[0]*up[2];
side[2] = forward[0]*up[1] - forward[1]*up[0];
tmp = sqrt(side[0]*side[0] + side[1]*side[1] + side[2]*side[2]);
if (tmp != 0.0)
{
side[0] /= tmp;
side[1] /= tmp;
side[2] /= tmp;
}
up[0] = side[1]*forward[2] - side[2]*forward[1];
up[1] = side[2]*forward[0] - side[0]*forward[2];
up[2] = side[0]*forward[1] - side[1]*forward[0];
m[0][0] = 1.0f; m[0][1] = 0.0f; m[0][2] = 0.0f; m[0][3] = 0.0f;
m[1][0] = 0.0f; m[1][1] = 1.0f; m[1][2] = 0.0f; m[1][3] = 0.0f;
m[2][0] = 0.0f; m[2][1] = 0.0f; m[2][2] = 1.0f; m[2][3] = 0.0f;
m[3][0] = 0.0f; m[3][1] = 0.0f; m[3][2] = 0.0f; m[3][3] = 1.0f;
m[0][0] = side[0];
m[1][0] = side[1];
m[2][0] = side[2];
m[0][1] = up[0];
m[1][1] = up[1];
m[2][1] = up[2];
m[0][2] = -forward[0];
m[1][2] = -forward[1];
m[2][2] = -forward[2];
MultMatrixf(&m[0][0]);
Translatef(-eyex, -eyey, -eyez);
}
void GL2ChunkRenderer::renderChunk(vec3i64 chunkCoords) {
auto it = renderInfos.find(chunkCoords);
if (it == renderInfos.end() || it->second.dl == 0)
return;
Character &character = client->getLocalCharacter();
vec3i64 cd = chunkCoords - character.getChunkPos();
GL(PushMatrix());
GL(Translatef(cd[0] * (float) Chunk::WIDTH, cd[1] * (float) Chunk::WIDTH, cd[2] * (float) Chunk::WIDTH))
GL(CallList(it->second.dl));
GL(PopMatrix());
}
