b7456401e0
Added image scene to render an image in a scene. There is also now a testing image that is an uber meme. Currently the problem is that the spritebatch cannot use the offsetof macro because it is a templated class. Possible solutions to this are changing it to be specifyable or implemented per vertex type as the other batches have been.
68 lines
3.1 KiB
C++
68 lines
3.1 KiB
C++
#pragma once
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#include "Poseable2D.h"
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#include "TextureRenderable.h"
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#include "Poseable2DBatch.h"
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namespace charcoal
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{
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namespace builtin
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{
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template <typename VertexType, typename IndexType>
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class SpriteBatch : public Poseable2DBatch<VertexType, IndexType, TextureRenderable<VertexType, IndexType> >
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{
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// Note: This is VERY similar to builtin::textured::Batch
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// TODO: Use Poseable2D for each sprite's position
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// TODO: Have a texture
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// Note: Uses GL_TEXTURE0. The uniform for this texture should be set in the scene before rendering.
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SpriteBatch(
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TextureRenderable<VertexType, IndexType>* renderable,
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int element_count
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) : Poseable2DBatch<VertexType, IndexType, TextureRenderable<VertexType, IndexType> >(renderable, element_count)
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{}
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SpriteBatch(
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TextureRenderable<VertexType, IndexType>* renderable,
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int element_count,
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int element_render_count
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) : Poseable2DBatch<VertexType, IndexType, TextureRenderable<VertexType, IndexType> >(renderable, element_count, element_render_count)
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{}
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void preprender() const override
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{
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// Note: Uses GL_TEXTURE0. The uniform for this texture should be set in the scene.
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, charcoal::Batch<VertexType, IndexType, 1, TextureRenderable<VertexType, IndexType> >::m_p_renderable->get_texture()->get_texture());
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glBindSampler(0, charcoal::Batch<VertexType, IndexType, 1, TextureRenderable<VertexType, IndexType> >::m_p_renderable->get_sampler()->get_sampler());
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}
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protected:
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void setup_vao() override
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{
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glBindBuffer(GL_ARRAY_BUFFER, charcoal::Batch<VertexType, IndexType, 1, TextureRenderable<VertexType, IndexType> >::m_vertex_vbo);
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glEnableVertexAttribArray(0);
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glEnableVertexAttribArray(1);
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// TODO: Figure out how to do this without offsetof :(
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(VertexType), (void*)offsetof(VertexType, position));
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glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(VertexType), (void*)offsetof(VertexType, uv));
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glBindBuffer(GL_ARRAY_BUFFER, charcoal::Batch<VertexType, IndexType, 1, TextureRenderable<VertexType, IndexType> >::m_element_buffers[0]);
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glEnableVertexAttribArray(2);
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glEnableVertexAttribArray(3);
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glEnableVertexAttribArray(4);
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glEnableVertexAttribArray(5);
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glVertexAttribPointer(2, 4, GL_FLOAT, GL_FALSE, sizeof(Poseable2D), (void*)(0 * sizeof(vec4)));
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glVertexAttribPointer(3, 4, GL_FLOAT, GL_FALSE, sizeof(Poseable2D), (void*)(1 * sizeof(vec4)));
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glVertexAttribPointer(4, 4, GL_FLOAT, GL_FALSE, sizeof(Poseable2D), (void*)(2 * sizeof(vec4)));
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glVertexAttribPointer(5, 4, GL_FLOAT, GL_FALSE, sizeof(Poseable2D), (void*)(3 * sizeof(vec4)));
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glVertexAttribDivisor(0, 0); // Send the mesh data once
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glVertexAttribDivisor(1, 0); // Send the mesh data once
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glVertexAttribDivisor(2, 1); // Send the offset data for each instance drawn
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glVertexAttribDivisor(3, 1); // Send the offset data for each instance drawn
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glVertexAttribDivisor(4, 1); // Send the offset data for each instance drawn
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glVertexAttribDivisor(5, 1); // Send the offset data for each instance drawn
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}
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};
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}
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}
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