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Port particles renderer to use shaders (without VBO yet)

pull/3/head
Hleb Valoshka 2019-11-11 23:34:37 +03:00
parent b0ec6d6fc2
commit 702531879c
1 changed files with 20 additions and 26 deletions
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46
src/celengine/render.cpp
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@ -7060,35 +7060,29 @@ void Renderer::labelConstellations(const AsterismList& asterisms,
void Renderer::renderParticles(const vector<Particle>& particles,
const Quaternionf& orientation)
const Quaternionf& /*orientation*/)
{
int nParticles = particles.size();
ShaderProperties shaderprop;
shaderprop.lightModel = ShaderProperties::ParticleModel;
shaderprop.texUsage = ShaderProperties::PointSprite;
auto *prog = shaderManager->getShader(shaderprop);
if (prog == nullptr)
return;
prog->use();
{
Matrix3f m = orientation.conjugate().toRotationMatrix();
Vector3f v0 = m * Vector3f(-1, -1, 0);
Vector3f v1 = m * Vector3f( 1, -1, 0);
Vector3f v2 = m * Vector3f( 1, 1, 0);
Vector3f v3 = m * Vector3f(-1, 1, 0);
glEnable(GL_POINT_SPRITE);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, sizeof(Particle), &particles[0].center);
glEnableVertexAttribArray(CelestiaGLProgram::PointSizeAttributeIndex);
glVertexAttribPointer(CelestiaGLProgram::PointSizeAttributeIndex,
1, GL_FLOAT, GL_FALSE,
sizeof(Particle), &particles[0].size);
glDrawArrays(GL_POINTS, 0, particles.size());
glBegin(GL_QUADS);
for (int i = 0; i < nParticles; i++)
{
Vector3f center = particles[i].center;
float size = particles[i].size;
glColor(particles[i].color);
glTexCoord2f(0, 1);
glVertex(center + (v0 * size));
glTexCoord2f(1, 1);
glVertex(center + (v1 * size));
glTexCoord2f(1, 0);
glVertex(center + (v2 * size));
glTexCoord2f(0, 0);
glVertex(center + (v3 * size));
}
glEnd();
}
glDisableClientState(GL_VERTEX_ARRAY);
glDisableVertexAttribArray(CelestiaGLProgram::PointSizeAttributeIndex);
glUseProgram(0);
glDisable(GL_POINT_SPRITE);
}
void Renderer::renderAnnotations(const vector<Annotation>& annotations, FontStyle fs)