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WaterComponent.cpp
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WaterComponent.cpp
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#include "WaterComponent.h"
#include <VrLib/gl/VAO.h>
#include <VrLib/gl/shader.h>
#include <VrLib/Texture.h>
#include <VrLib/json.hpp>
#include <VrLib/gl/Cubemap.h>
#include <VrLib/tien/Terrain.h>
#include <VrLib/tien/components/Transform.h>
#include <VrLib/tien/Node.h>
#include <VrLib/util.h>
WaterComponent::WaterComponent(const glm::vec2 &size, float resolution)
{
std::vector<glm::vec3> verts;
verts.push_back(glm::vec3(-0, 0, -0));
verts.push_back(glm::vec3(1, 0, -0));
verts.push_back(glm::vec3(1, 0, 1));
verts.push_back(glm::vec3(-0, 0, 1));
renderContextDeferred = WaterRenderContext::getInstance();
std::vector<vrlib::gl::VertexP3> vertices;
vrlib::gl::VertexP3 v;
for (float x = -size.x/2; x < size.y/2; x += resolution)
for (float y = -size.y/2; y < size.y/2; y += resolution)
for (auto vv : verts)
{
vrlib::gl::setP3(v, vv * resolution + glm::vec3(x, 0, y));
vertices.push_back(v);
}
vbo.bind();
vbo.setData(vertices.size(), &vertices[0], GL_STATIC_DRAW);
vao = new vrlib::gl::VAO(&vbo);
cubemap = new vrlib::gl::CubeMap();
cubemap->setTexture(0, "data/NetworkEngine/textures/SkyBoxes/interstellar/interstellar_rt.png");
cubemap->setTexture(1, "data/NetworkEngine/textures/SkyBoxes/interstellar/interstellar_lf.png");
cubemap->setTexture(2, "data/NetworkEngine/textures/SkyBoxes/interstellar/interstellar_up.png");
cubemap->setTexture(3, "data/NetworkEngine/textures/SkyBoxes/interstellar/interstellar_dn.png");
cubemap->setTexture(4, "data/NetworkEngine/textures/SkyBoxes/interstellar/interstellar_bk.png");
cubemap->setTexture(5, "data/NetworkEngine/textures/SkyBoxes/interstellar/interstellar_ft.png");
time = 0;
}
void WaterComponent::update(float elapsedTime, vrlib::tien::Scene& scene)
{
time += elapsedTime;
}
void WaterComponent::drawForwardPass()
{
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_CULL_FACE);
vrlib::tien::components::Transform* t = node->getComponent<vrlib::tien::components::Transform>();
WaterRenderContext* context = dynamic_cast<WaterRenderContext*>(renderContextDeferred);
context->renderShader->use();
context->renderShader->setUniform(WaterRenderContext::RenderUniform::modelMatrix, context->view * t->globalTransform);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::normalMatrix, glm::transpose(glm::inverse(glm::mat3(context->view * t->globalTransform))));
context->renderShader->setUniform(WaterRenderContext::RenderUniform::time, time);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::eyePos, glm::vec3(glm::inverse(context->view * t->globalTransform) * glm::vec4(0,0,0,1)));
if (!setup)
{
setup = true;
context->renderShader->setUniform(WaterRenderContext::RenderUniform::numWaves, 6);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::envMap, 0);
for (int i = 0; i < 4; ++i) {
float amplitude = 0.15f / (i + 1);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::amplitude, i, amplitude);
float wavelength = 8 * glm::pi<float>() / (i + 1);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::wavelength, i, wavelength);
float speed = 1.0f + 2 * i;
context->renderShader->setUniform(WaterRenderContext::RenderUniform::speed, i, speed);
float angle = vrlib::util::random(-glm::pi<float>() / 3, glm::pi<float>() / 3);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::direction, i, glm::vec2(cos(angle), sin(angle)));
}
context->renderShader->setUniform(WaterRenderContext::RenderUniform::amplitude, 4, 0.001f);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::wavelength, 4, 0.9f);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::speed, 4, 0.1f);
float angle = vrlib::util::random(-glm::pi<float>() / 3, glm::pi<float>() / 3);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::direction, 4, glm::vec2(cos(angle), sin(angle)));
context->renderShader->setUniform(WaterRenderContext::RenderUniform::amplitude, 5, 0.001f);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::wavelength, 5, 0.45f);
context->renderShader->setUniform(WaterRenderContext::RenderUniform::speed, 5, 0.07f);
angle = angle + 2;
context->renderShader->setUniform(WaterRenderContext::RenderUniform::direction, 5, glm::vec2(cos(angle), sin(angle)));
}
glActiveTexture(GL_TEXTURE0);
cubemap->bind();
vao->bind();
glDrawArrays(GL_QUADS, 0, vbo.getLength());
vao->unBind();
glEnable(GL_CULL_FACE);
}
void WaterComponent::drawShadowMap()
{
}
void WaterComponent::WaterRenderContext::frameSetup(const glm::mat4 &projectionMatrix, const glm::mat4 &viewMatrix)
{
renderShader->use();
renderShader->setUniform(RenderUniform::projectionMatrix, projectionMatrix);
view = viewMatrix;
}
void WaterComponent::WaterRenderContext::init()
{
renderShader = new vrlib::gl::Shader<RenderUniform>("data/NetworkEngine/shaders/Water.vert", "data/NetworkEngine/shaders/Water.frag");
renderShader->bindAttributeLocation("a_position", 0);
renderShader->link();
renderShader->bindFragLocation("fragColor", 0);
//shader->bindFragLocation("fragColor", 0);
renderShader->registerUniform(RenderUniform::modelMatrix, "modelMatrix");
renderShader->registerUniform(RenderUniform::projectionMatrix, "projectionMatrix");
renderShader->registerUniform(RenderUniform::normalMatrix, "normalMatrix");
renderShader->registerUniform(RenderUniform::eyePos, "eyePos");
renderShader->registerUniform(RenderUniform::time, "time");
renderShader->registerUniform(RenderUniform::envMap, "envMap");
renderShader->registerUniform(RenderUniform::numWaves, "numWaves");
renderShader->registerUniformArray(RenderUniform::amplitude, "amplitude", 8);
renderShader->registerUniformArray(RenderUniform::wavelength, "wavelength", 8);
renderShader->registerUniformArray(RenderUniform::speed, "speed", 8);
renderShader->registerUniformArray(RenderUniform::direction, "direction", 8);
renderShader->use();
}
json WaterComponent::toJson(json &meshes) const
{
json ret;
ret["type"] = "water";
return ret;
}