KlassischeKeplerKriege/game/renderer_ray_tracer/renderer_ray_tracer.cpp
2016-09-28 11:50:35 +02:00

88 lines
2.8 KiB
C++

#include "renderer_ray_tracer.hpp"
#include <vector>
#include "glm/glm.hpp"
#include "glm/vec2.hpp"
#include "glm/vec3.hpp"
#include "glm/gtc/type_ptr.hpp"
static const char *vss =
#include "raycaster.vs"
;
static const char *fss =
#include "raycaster.fs"
;
namespace endofthejedi {
RendererRayTracer::RendererRayTracer() {
m_shader.load(vss, GL_VERTEX_SHADER);
m_shader.load(fss, GL_FRAGMENT_SHADER);
}
void RendererRayTracer::render(const game::State *state) {
m_shader.bind();
std::vector<glm::vec3> positions;
std::vector<glm::vec4> colors;
std::vector<GLfloat> radii;
std::vector<GLfloat> reflections;
for (const game::Planet *planet : state->planets) {
positions.push_back(glm::vec3(planet->position, -5.0f));
radii.push_back(planet->radius);
colors.push_back(glm::vec4(1.0f, 0.0f, 0.0f, 0.5f));
}
for (const game::Ship *ship : state->ships) {
positions.push_back(glm::vec3(ship->position, -3.0f));
radii.push_back(ship->radius);
colors.push_back(glm::vec4(1.0f, 0.0f, 0.0f, 0.5f));
}
for (const game::Player *player : state->players) {
for (const game::Missile *missile : player->missiles) {
positions.push_back(glm::vec3(missile->position, -3.0f));
radii.push_back(0.01f);
colors.push_back(glm::vec4(1.0f, 0.0f, 0.0f, 0.5f));
}
}
for (auto &pos : positions) {
pos.x *= 5;
pos.y *= 5;
}
for (auto &rad : radii) {
rad *= 5;
}
/*
for (const game::Trace *trace : state->traces) {
positions.push_back(glm::vec3(trace->position, -3.0f));
radii.push_back(trace->radius);
colors.push_back(glm::vec4(0.0f, 1.0f, 0.0f, 0.5f));
}*/
glUniform1f(m_shader.location("aspectratio"), 1.0f);
glUniform1i(m_shader.location("reflections"), 1);
glUniform3f(m_shader.location("l_position"), 0.6f, 0.1f, 0.0f);
glUniform1f(m_shader.location("l_radius"), 1.0f);
glUniform3fv(m_shader.location("s_positions"), positions.size(),
glm::value_ptr(positions[0]));
glUniform4fv(m_shader.location("s_colors"), colors.size(),
glm::value_ptr(colors[0]));
glUniform1fv(m_shader.location("s_radii"), radii.size(), &radii[0]);
glUniform1i(m_shader.location("s_length"), positions.size());
// render fullscreen quad with legacy opengl (too lazy, sorry)
glBegin(GL_QUADS);
glVertex2f(-1.0f, -1.0f);
glVertex2f(1.0f, -1.0f);
glVertex2f(1.0f, 1.0f);
glVertex2f(-1.0f, 1.0f);
glEnd();
}
}