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remove indirection in vertex builder

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veclavtalica
2025-01-17 22:48:35 +03:00
parent 40aef0a1f9
commit 8a5d639f95
8 changed files with 53 additions and 85 deletions
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30
src/rendering/twn_gl_any_rendering.c
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@ -44,16 +44,15 @@ VertexBuffer get_quad_element_buffer(void) {
VertexBufferBuilder builder = build_vertex_buffer(buffer, sizeof (GLshort) * QUAD_ELEMENT_BUFFER_LENGTH * 6 );
for (size_t i = 0; i < QUAD_ELEMENT_BUFFER_LENGTH; ++i) {
GLshort indices[6];
indices[0] = (GLshort)(i * 4 + 0);
indices[1] = (GLshort)(i * 4 + 1);
indices[2] = (GLshort)(i * 4 + 2);
indices[3] = (GLshort)(i * 4 + 2);
indices[4] = (GLshort)(i * 4 + 3);
indices[5] = (GLshort)(i * 4 + 0);
push_to_vertex_buffer_builder(&builder, indices, sizeof indices);
((GLshort *)builder.base)[i * 6 + 0] = (GLshort)(i * 4 + 0);
((GLshort *)builder.base)[i * 6 + 1] = (GLshort)(i * 4 + 1);
((GLshort *)builder.base)[i * 6 + 2] = (GLshort)(i * 4 + 2);
((GLshort *)builder.base)[i * 6 + 3] = (GLshort)(i * 4 + 2);
((GLshort *)builder.base)[i * 6 + 4] = (GLshort)(i * 4 + 3);
((GLshort *)builder.base)[i * 6 + 5] = (GLshort)(i * 4 + 0);
}
finish_vertex_builder(&builder);
}
SDL_assert_always(buffer);
@ -71,17 +70,14 @@ VertexBuffer get_circle_element_buffer(void) {
for (size_t i = 1; i < CIRCLE_VERTICES_MAX - 1; ++i) {
/* first one is center point index, always zero */
GLshort indices[3];
indices[0] = 0;
((GLshort *)builder.base)[(i - 1) * 3 + 0] = 0;
/* generated point index */
indices[1] = (GLshort)i;
indices[2] = (GLshort)i + 1;
push_to_vertex_buffer_builder(&builder, indices, sizeof indices);
((GLshort *)builder.base)[(i - 1) * 3 + 1] = (GLshort)i;
((GLshort *)builder.base)[(i - 1) * 3 + 2] = (GLshort)i + 1;
}
finish_vertex_builder(&builder);
}
SDL_assert_always(buffer);