Mesh::Mesh()
{
BufferLayout layout;
layout.add(ET_vec3_f32, UT_position);
layout.add(ET_vec2_f32, UT_texcoord0);
init(layout, ET_u16);
}
DrawContext::DrawContext(Context* ctx)
{
glContext = ctx;
_textBuffer = new TextBuffer;
// load some common shaders
colorShader = Application::instance()->resourceManager->shader("resources/glsl/color");
textureShader = Application::instance()->resourceManager->shader("resources/glsl/texture");
// create buffers for efficient quad drawing. Vertex and index buffers are reused as often as possible
BufferLayout layout;
layout.add(ET_vec2_f32, UT_position);
layout.add(ET_vec2_f32, UT_texcoord0);
bgquad = Mesh::create(layout, ET_u16);
bgquad->resetSize(4, 6);
bgquad->indexBuffer->drawMode = GL_TRIANGLES;
bgquad->set(0, UT_position, Vec2(0,0));
bgquad->set(1, UT_position, Vec2(1,0));
bgquad->set(2, UT_position, Vec2(1,1));
bgquad->set(3, UT_position, Vec2(0,1));
bgquad->set(0,UT_texcoord0, Vec2(0,0));
bgquad->set(1,UT_texcoord0, Vec2(1,0));
bgquad->set(2,UT_texcoord0, Vec2(1,1));
bgquad->set(3,UT_texcoord0, Vec2(0,1));
bgquad->set(0, UT_index, (u16)0);
bgquad->set(1, UT_index, (u16)1);
bgquad->set(2, UT_index, (u16)2);
bgquad->set(3, UT_index, (u16)2);
bgquad->set(4, UT_index, (u16)3);
bgquad->set(5, UT_index, (u16)0);
bgquad->material->shader = colorShader;
bgquad->material->color = whiteColor;
bgquad->material->blendPremultiplied();
textMesh.reset(new TextMesh);
textMesh->material->shader = textureShader;
textMesh->material->color = whiteColor;
_flipX = false;
_flipY = false;
updateTexCoords();
ninePatch.reset(new NinePatch);
ninePatch->flip = true;
ninePatch->material->shader = textureShader;
ninePatch->material->blendPremultiplied();
}
void NinePatch::init()
{
BufferLayout layout;
layout.add(ET_vec2_f32, UT_position);
layout.add(ET_vec2_f32, UT_texcoord0);
this->resetBuffers(layout, ET_u16);
indexBuffer->drawMode = GL_TRIANGLES;
u32 numVertices = 16; // draw it on paper and you'll see it's correct
uint32_t numQuads = 9; // it's a 3x3 matrix of quads
uint32_t numTris = numQuads*2; // each quad is drawn with two tris
u32 numIndices = numTris*3; // currently, each tri is drawn with 3 indices
this->vertexBuffer->reset(numVertices);
this->indexBuffer->reset(numIndices);
// updateTexCoords();
updateIndices();
}
HybridIndexBuffer::HybridIndexBuffer(ElementType et)
{
// an indexbuffer only ever has one attribute with usage type index in a single partition
// only the element type can vary, to optimize the buffer for hardware requirements or
// mesh sizes.
BufferLayout layout;
layout.add(et, UT_index);
switch(et)
{
case ET_u8:type = GL_UNSIGNED_BYTE;break;
case ET_u16:type = GL_UNSIGNED_SHORT;break;
case ET_u32:type = GL_UNSIGNED_INT;break;
default:
ASSERT(false,"only u8, u16, u32 are allowed");
}
drawMode = GL_TRIANGLES;
init(GL_ELEMENT_ARRAY_BUFFER, layout);
}
HybridIndexBuffer::HybridIndexBuffer(ElementType et)
{
// an indexbuffer only ever has one attribute with usage type index in a single partition
// only the element type can vary, to optimize the buffer for hardware requirements or
// mesh sizes.
BufferLayout layout;
layout.add(et, UT_index);
switch(et)
{
case ET_u8:type = GL_UNSIGNED_BYTE;break;
case ET_u16:type = GL_UNSIGNED_SHORT;break;
case ET_u32:type = GL_UNSIGNED_INT;break;
default:
lost::common::StringStream os;
os << "only u8, u16, u32 are allowed";
LOGTHROW(std::runtime_error(os.str().c_str()));
}
drawMode = GL_TRIANGLES;
init(GL_ELEMENT_ARRAY_BUFFER, layout);
BB_INC(bb_hib_key);
}
