comparison: src/mesh.c
src/mesh.c
- changeset 220
- 6b266e907f89
- parent 208
- 658bccb1bf73
- child 221
- 14eddd43b3f7
equal
deleted
inserted
replaced
| 219:62508d957a22 | 220:6b266e907f89 |
|---|---|
| 30 | 30 |
| 31 #include <cx/allocator.h> | 31 #include <cx/allocator.h> |
| 32 | 32 |
| 33 #include <GL/glew.h> | 33 #include <GL/glew.h> |
| 34 | 34 |
| 35 void asc_mesh_allocate_buffers(AscMesh *mesh, unsigned count) { | 35 int asc_mesh_allocate_buffers(AscMesh *mesh, unsigned count) { |
| 36 asc_dprintf("Allocate mesh buffers for %u meshes.", count); | 36 asc_dprintf("Allocate mesh buffers for %u meshes.", count); |
| 37 GLuint buffers[count]; | 37 GLuint buffers[count]; |
| 38 GLuint arrays[count]; | 38 GLuint arrays[count]; |
| 39 glGenBuffers(count, buffers); | 39 glGenBuffers(count, buffers); |
| 40 glGenVertexArrays(count, arrays); | 40 glGenVertexArrays(count, arrays); |
| 41 for (unsigned i = 0; i < count; i++) { | 41 for (unsigned i = 0; i < count; i++) { |
| 42 mesh[i].vbo = buffers[i]; | 42 mesh[i].vbo = buffers[i]; |
| 43 mesh[i].vao = arrays[i]; | 43 mesh[i].vao = arrays[i]; |
| 44 } | 44 } |
| 45 asc_error_catch_all_gl(); | 45 return asc_error_catch_all_gl(); |
| 46 } | 46 } |
| 47 | 47 |
| 48 void asc_mesh_free_buffers(AscMesh *mesh, unsigned count) { | 48 void asc_mesh_free_buffers(AscMesh *mesh, unsigned count) { |
| 49 if (count == 1 && mesh->vbo == 0) return; // hack to skip this function until we remove it | 49 if (count == 1 && mesh->vbo == 0) return; // hack to skip this function until we remove it |
| 50 asc_dprintf("Free mesh buffers for %u meshes.", count); | 50 asc_dprintf("Free mesh buffers for %u meshes.", count); |
| 77 asc_mesh_free_buffers(mesh, 1); | 77 asc_mesh_free_buffers(mesh, 1); |
| 78 cxFreeDefault(mesh->vtx_data); | 78 cxFreeDefault(mesh->vtx_data); |
| 79 } | 79 } |
| 80 | 80 |
| 81 void asc_mesh_init_plane_2d(AscMesh *mesh, struct asc_mesh_init_plane_2d_args args) { | 81 void asc_mesh_init_plane_2d(AscMesh *mesh, struct asc_mesh_init_plane_2d_args args) { |
| 82 if (mesh->vbo == 0) { | 82 if (mesh->vao == 0) { |
| 83 asc_mesh_allocate_buffers(mesh, 1); | 83 if (asc_mesh_allocate_buffers(mesh, 1)) return; |
| 84 // bind the buffer and configure the vertex attributes | |
| 85 glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo); | |
| 86 glBindVertexArray(mesh->vao); | |
| 87 glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(asc_vertex2d), (void*)offsetof(asc_vertex2d, pos)); | |
| 88 glEnableVertexAttribArray(0); | |
| 89 glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(asc_vertex2d), (void*)offsetof(asc_vertex2d, uv)); | |
| 90 glEnableVertexAttribArray(1); | |
| 91 } else { | |
| 92 // only bind the buffer for updating the data | |
| 93 glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo); | |
| 84 } | 94 } |
| 85 | 95 |
| 86 unsigned required_memory = 4 * sizeof(asc_vertex2d); | 96 unsigned required_memory = 4 * sizeof(asc_vertex2d); |
| 87 | 97 |
| 88 // free any previous data | 98 // free any previous data |
| 119 data[2].pos = ASC_VEC2F(args.size.x, 0.0f); | 129 data[2].pos = ASC_VEC2F(args.size.x, 0.0f); |
| 120 data[2].uv = ASC_VEC2F(args.uv_offset.x + args.uv_scale.x, args.uv_offset.y); | 130 data[2].uv = ASC_VEC2F(args.uv_offset.x + args.uv_scale.x, args.uv_offset.y); |
| 121 // top right | 131 // top right |
| 122 data[3].pos = ASC_VEC2F(args.size.x, args.size.y); | 132 data[3].pos = ASC_VEC2F(args.size.x, args.size.y); |
| 123 data[3].uv = ASC_VEC2F(args.uv_offset.x + args.uv_scale.x, args.uv_offset.y + args.uv_scale.y); | 133 data[3].uv = ASC_VEC2F(args.uv_offset.x + args.uv_scale.x, args.uv_offset.y + args.uv_scale.y); |
| 124 glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo); | |
| 125 glBufferData(GL_ARRAY_BUFFER, mesh->vtx_data_size, mesh->vtx_data, GL_STATIC_DRAW); | 134 glBufferData(GL_ARRAY_BUFFER, mesh->vtx_data_size, mesh->vtx_data, GL_STATIC_DRAW); |
| 126 // TODO: this should not be repeated for every adjustment - but it will be moved to the batch renderer anyway | |
| 127 glBindVertexArray(mesh->vao); | |
| 128 glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(asc_vertex2d), (void*)offsetof(asc_vertex2d, pos)); | |
| 129 glEnableVertexAttribArray(0); | |
| 130 glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(asc_vertex2d), (void*)offsetof(asc_vertex2d, uv)); | |
| 131 glEnableVertexAttribArray(1); | |
| 132 | 135 |
| 136 // TODO: replace with specific error handling for setting the buffer | |
| 133 asc_error_catch_all_gl(); | 137 asc_error_catch_all_gl(); |
| 134 } | 138 } |
