bool render()
{
glm::ivec2 WindowSize(this->getWindowSize());
glm::vec3 MinScissor( 10000.f);
glm::vec3 MaxScissor(-10000.f);
{
glBindBuffer(GL_UNIFORM_BUFFER, BufferName[buffer::TRANSFORM]);
glm::mat4* Pointer = (glm::mat4*)glMapBufferRange(
GL_UNIFORM_BUFFER, 0, sizeof(glm::mat4),
GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
glm::mat4 Projection = glm::perspective(glm::pi<float>() * 0.25f, 4.0f / 3.0f, 0.1f, 100.0f);
glm::mat4 View = this->view();
glm::mat4 Model = glm::mat4(1.0f);
*Pointer = Projection * View * Model;
// Make sure the uniform buffer is uploaded
glUnmapBuffer(GL_UNIFORM_BUFFER);
glm::mat4 Ortho = glm::ortho(0.0f, 0.0f, float(WindowSize.x), float(WindowSize.y));
for(GLsizei i = 0; i < VertexCount; ++i)
{
glm::vec3 Projected = glm::project(
glm::vec3(VertexData[i].Position, 0.0f),
View * Model,
Projection,
glm::ivec4(0, 0, WindowSize.x, WindowSize.y));
MinScissor = glm::min(MinScissor, glm::vec3(Projected));
MaxScissor = glm::max(MaxScissor, glm::vec3(Projected));
}
}
glViewport(0, 0, WindowSize.x, WindowSize.y);
glClearBufferfv(GL_COLOR, 0, &glm::vec4(1.0f, 0.5f, 0.0f, 1.0f)[0]);
glScissor(GLint(MinScissor.x), GLint(MinScissor.y), GLsizei(MaxScissor.x - MinScissor.x), GLsizei(MaxScissor.y - MinScissor.y));
glEnable(GL_SCISSOR_TEST);
glClearBufferfv(GL_COLOR, 0, &glm::vec4(0.0f, 0.0f, 0.0f, 1.0f)[0]);
// Bind the program for use
glUseProgram(ProgramName);
glUniform1i(UniformDiffuse, 0);
glUniformBlockBinding(ProgramName, UniformTransform, semantic::uniform::TRANSFORM0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, TextureName);
glBindBufferBase(GL_UNIFORM_BUFFER, semantic::uniform::TRANSFORM0, BufferName[buffer::TRANSFORM]);
glBindVertexArray(VertexArrayName);
glDrawArraysInstanced(GL_TRIANGLES, 0, VertexCount, 1);
glDisable(GL_SCISSOR_TEST);
return true;
}
void display()
{
// Compute the MVP (Model View Projection matrix)
glm::mat4 Projection = glm::perspective(45.0f, 4.0f / 3.0f, 0.1f, 100.0f);
glm::mat4 ViewTranslate = glm::translate(glm::mat4(1.0f), glm::vec3(0.0f, 0.0f, -Window.TranlationCurrent.y));
glm::mat4 ViewRotateX = glm::rotate(ViewTranslate, Window.RotationCurrent.y, glm::vec3(1.f, 0.f, 0.f));
glm::mat4 View = glm::rotate(ViewRotateX, Window.RotationCurrent.x, glm::vec3(0.f, 1.f, 0.f));
glm::mat4 Model = glm::mat4(1.0f);
glm::mat4 MVP = Projection * View * Model;
glViewport(0, 0, Window.Size.x, Window.Size.y);
glClearColor(1.0f, 0.5f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
glm::vec3 MinScissor( 10000.f);
glm::vec3 MaxScissor(-10000.f);
glm::mat4 Ortho = glm::ortho(0.0f, 0.0f, 640.f, 480.0f);
for(GLsizei i = 0; i < VertexCount; ++i)
{
glm::vec3 Projected = glm::project(
glm::vec3(VertexData[i].Position, 0.0f),
View * Model,
Projection,
glm::ivec4(0, 0, Window.Size.x, Window.Size.y));
MinScissor = glm::min(MinScissor, glm::vec3(Projected));
MaxScissor = glm::max(MaxScissor, glm::vec3(Projected));
}
glScissor(GLint(MinScissor.x), GLint(MinScissor.y), GLsizei(MaxScissor.x - MinScissor.x), GLsizei(MaxScissor.y - MinScissor.y));
glEnable(GL_SCISSOR_TEST);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
// Bind the program for use
glUseProgram(ProgramName);
glUniform1i(UniformDiffuse, 0);
glUniformMatrix4fv(UniformMVP, 1, GL_FALSE, &MVP[0][0]);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, Texture2DName);
glBindVertexArray(VertexArrayName);
glDrawArrays(GL_TRIANGLES, 0, VertexCount);
glf::checkError("display");
glf::swapBuffers();
}
void display()
{
glm::vec3 MinScissor( 10000.f);
glm::vec3 MaxScissor(-10000.f);
// Update of the uniform buffer
{
glBindBuffer(GL_UNIFORM_BUFFER, BufferName[buffer::TRANSFORM]);
glm::mat4* Pointer = (glm::mat4*)glMapBufferRange(
GL_UNIFORM_BUFFER, 0, sizeof(glm::mat4),
GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
glm::mat4 Projection = glm::perspective(45.0f, 4.0f / 3.0f, 0.1f, 100.0f);
glm::mat4 ViewTranslate = glm::translate(glm::mat4(1.0f), glm::vec3(0.0f, 0.0f, -Window.TranlationCurrent.y));
glm::mat4 ViewRotateX = glm::rotate(ViewTranslate, Window.RotationCurrent.y, glm::vec3(1.f, 0.f, 0.f));
glm::mat4 View = glm::rotate(ViewRotateX, Window.RotationCurrent.x, glm::vec3(0.f, 1.f, 0.f));
glm::mat4 Model = glm::mat4(1.0f);
*Pointer = Projection * View * Model;
// Make sure the uniform buffer is uploaded
glUnmapBuffer(GL_UNIFORM_BUFFER);
glm::mat4 Ortho = glm::ortho(0.0f, 0.0f, float(Window.Size.x), float(Window.Size.y));
for(GLsizei i = 0; i < VertexCount; ++i)
{
glm::vec3 Projected = glm::project(
glm::vec3(VertexData[i].Position, 0.0f),
View * Model,
Projection,
glm::ivec4(0, 0, Window.Size.x, Window.Size.y));
MinScissor = glm::min(MinScissor, glm::vec3(Projected));
MaxScissor = glm::max(MaxScissor, glm::vec3(Projected));
}
}
glViewport(0, 0, Window.Size.x, Window.Size.y);
glClearBufferfv(GL_COLOR, 0, &glm::vec4(1.0f, 0.5f, 0.0f, 1.0f)[0]);
glScissor(GLint(MinScissor.x), GLint(MinScissor.y), GLsizei(MaxScissor.x - MinScissor.x), GLsizei(MaxScissor.y - MinScissor.y));
glEnable(GL_SCISSOR_TEST);
glClearBufferfv(GL_COLOR, 0, &glm::vec4(0.0f, 0.0f, 0.0f, 1.0f)[0]);
// Bind the program for use
glUseProgram(ProgramName);
glUniform1i(UniformDiffuse, 0);
glUniformBlockBinding(ProgramName, UniformTransform, glf::semantic::uniform::TRANSFORM0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, TextureName);
glBindBufferBase(GL_UNIFORM_BUFFER, glf::semantic::uniform::TRANSFORM0, BufferName[buffer::TRANSFORM]);
glBindVertexArray(VertexArrayName);
glDrawArraysInstanced(GL_TRIANGLES, 0, VertexCount, 1);
glDisable(GL_SCISSOR_TEST);
glf::checkError("display");
glf::swapBuffers();
}