hge::shader::SunShader::SunShader(const glm::vec3 &sunDirection):
shaderProgram(render::ShaderEngine::createProgram())
{
std::string pVS(
"#version 430\n"
"layout (location = 0) in vec3 vertex;"
//All of the normals must be normalized.
"layout (location = 1) in vec3 normal;"
"layout (location = 2) in vec2 uv;"
"out vec2 outUV;"
"out float lightIntensity;"
"uniform mat4 mvp;"
"uniform mat4 m;"
//Sun direction must be normalized.
"uniform vec3 s;"
"void main()"
"{"
"lightIntensity = float(max(float(dot(s, vec3(m * vec4(normal, 1.0)))), 0.1));"
"gl_Position = mvp * vec4(vertex, 1.0);"
"outUV = uv;"
"}");
///////////////////////////////////////////////////////////////////////
std::string pFS(
"#version 430\n"
"in vec2 outUV;"
"out vec4 fragColor;"
"in float lightIntensity;"
"uniform sampler2D textureSampler;"
"void main()"
"{"
"fragColor=texture2D(textureSampler,outUV.xy)*lightIntensity;"
"};");
///////////////////////////////////////////////////////////////////////
vertexShaderProgram = render::ShaderEngine::addShaderToProgram(pVS, GL_VERTEX_SHADER, shaderProgram);
fragmentShaderProgram = render::ShaderEngine::addShaderToProgram(pFS, GL_FRAGMENT_SHADER, shaderProgram);
hge::render::ShaderEngine::run(shaderProgram);
modelMatrixUniformLocation = render::ShaderEngine::getUniformLocation(std::string("m"), shaderProgram);
assert(modelMatrixUniformLocation != 0xFFFFFFFF);
modelViewProjectionMatrixUniformLocation = render::ShaderEngine::getUniformLocation(std::string("mvp"), shaderProgram);
assert(modelViewProjectionMatrixUniformLocation != 0xFFFFFFFF);
sunLightDirectionUniformLocation = render::ShaderEngine::getUniformLocation(std::string("s"), shaderProgram);
assert(sunLightDirectionUniformLocation != 0xFFFFFFFF);
textureSamplerLocation = render::ShaderEngine::getUniformLocation(std::string("textureSampler"), shaderProgram);
assert(textureSamplerLocation != 0xFFFFFFFF);
glUniform1i(textureSamplerLocation, 0);
}
void CMesh::VertexShade(VERTEX(*pVS)(VERTEX V)) {
for (size_t i = 0; i < m_Vertices.size(); i++)
m_Vertices[i] = pVS(m_Vertices[i]);
}
