comparison: src/gl/gridprogram.cpp
src/gl/gridprogram.cpp
- changeset 167
- c1ff4f107569
- parent 156
- 65b75beed7e0
- child 216
- c7241f504117
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replaced
| 166:8857351912d0 | 167:c1ff4f107569 |
|---|---|
| 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. | 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 */ | 17 */ |
| 18 | 18 |
| 19 #include "gridprogram.h" | 19 #include "gridprogram.h" |
| 20 | 20 |
| 21 // Based on https://stackoverflow.com/q/30842755 | |
| 22 const char vertexShaderSource[] = R"( | 21 const char vertexShaderSource[] = R"( |
| 23 #version 330 core | 22 #version 330 core |
| 24 | 23 |
| 25 layout (location = 0) in vec2 in_position; | 24 layout (location = 0) in vec2 in_position; |
| 26 uniform mat4 view; | 25 uniform mat4 view; |
| 54 )"; | 53 )"; |
| 55 | 54 |
| 56 GridProgram::GridProgram(QObject *parent) : | 55 GridProgram::GridProgram(QObject *parent) : |
| 57 AbstractBasicShaderProgram{parent} | 56 AbstractBasicShaderProgram{parent} |
| 58 { | 57 { |
| 59 this->gridData.reserve(8004); | 58 constexpr int extent = 50; |
| 60 for (int i = -1000; i < 1000; i += 1) | 59 this->gridData.reserve(8 * extent + 4); |
| 60 for (int i = -extent; i <= extent; i += 1) | |
| 61 { | 61 { |
| 62 this->gridData.push_back({i, -1000}); | 62 this->gridData.push_back({i, -extent}); |
| 63 this->gridData.push_back({i, 1000}); | 63 this->gridData.push_back({i, extent}); |
| 64 } | 64 } |
| 65 for (int i = -1000; i < 1000; i += 1) | 65 for (int i = -extent; i <= extent; i += 1) |
| 66 { | 66 { |
| 67 this->gridData.push_back({-1000, i}); | 67 this->gridData.push_back({-extent, i}); |
| 68 this->gridData.push_back({1000, i}); | 68 this->gridData.push_back({extent, i}); |
| 69 } | 69 } |
| 70 } | 70 } |
| 71 | 71 |
| 72 void GridProgram::setGridMatrix(const glm::mat4& newGridMatrix) | 72 void GridProgram::setGridMatrix(const glm::mat4& newGridMatrix) |
| 73 { | 73 { |
