Changeset ae0c7f4 in opengl-game for new-game.cpp
- Timestamp:
- Jan 31, 2019, 5:34:43 AM (6 years ago)
- Branches:
- feature/imgui-sdl, master, points-test
- Children:
- 7a55b49
- Parents:
- 39ac76d (diff), bebfd5c (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
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- 1 edited
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new-game.cpp
r39ac76d rae0c7f4 587 587 model_mat_idx_vbo); 588 588 589 /* TODO: Fix the UBO binding code based on the following forum post (in order to support multiple ubos): 590 591 No, you're misunderstanding how this works. UBO binding works exactly like texture object binding. 592 593 The OpenGL context has a number of slots for binding UBOs. There are GL_MAX_UNIFORM_BUFFER_BINDINGS number of 594 slots for UBO binding. 595 596 Uniform Blocks in a program can be set to use one of the slots in the context. You do this by first querying 597 the block index using the block name (glGetUniformBlockIndex). This is similar to how you need to use 598 glGetUniformLocation in order to set a uniform's value with glUniform. Block indices, like uniform locations, 599 are specific to a program. 600 601 Once you have the block index, you use glUniformBlockBinding to set that specific program to use a particular 602 uniform buffer slot in the context. 603 604 Let's say you have a global UBO that you want to use for every program. To make using it easier, you want to 605 bind it just once. 606 607 So first, you pick a uniform buffer slot in the context, one that always will refer to this UBO. Let's say 608 you pick slot 8. 609 610 When you build a program object that may use this global uniform buffer, what you do is quite simple. First, 611 after linking the program, call glGetUniformBlockIndex(program, "NameOfGlobalUniformBlock"). If you get back 612 GL_INVALID_INDEX, then you know that the global uniform block isn't used in that program. Otherwise you get 613 back a block index. 614 615 If you got a valid block index, then you call glUniformBlockBinding(program, uniformBlockIndex, 8). Remember 616 that 8 is the uniform buffer context slot that we selected earlier. This causes this particular program to 617 use uniform buffer slot #8 to find the buffer for "NameOfGlobalUniformBlock". 618 619 Finally, to set the actual buffer in the context, call glBindBufferRange(GL_UNIFORM_BUFFER, 8, 620 bufferObjectName, offset, size); 621 */ 622 589 623 GLuint ub_binding_point = 0; 590 624 … … 803 837 removeObjectFromScene(*objects[i], ubo); 804 838 } 805 // MARKER: Continue code review from here806 839 if (((Asteroid*)objects[i])->hp <= 0) { 807 840 // TODO: Optimize this so I don't recalculate the camera rotation every time
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