simple HUD

[blank.git] / src / hud.cpp

diff --git a/src/hud.cpp b/src/hud.cpp
new file mode 100644 (file)
index 0000000..7f127f4
--- /dev/null
+++ b/src/hud.cpp
@@ -0,0 +1,63 @@
+#include "hud.hpp"
+
+#include "init.hpp"
+#include "shape.hpp"
+
+#include <glm/gtc/matrix_transform.hpp>
+
+
+namespace blank {
+
+HUD::HUD()
+: block()
+, block_transform(1.0f)
+, block_visible(false)
+, crosshair()
+, crosshair_transform(1.0f)
+, near(100.0f)
+, far(-100.0f)
+, projection(glm::ortho(0.0f, 1.0f, 1.0f, 0.0f, near, far))
+, view(glm::translate(glm::mat4(1.0f), glm::vec3(-0.5f, -0.5f, 0))) {
+       block_transform = glm::translate(block_transform, glm::vec3(35.0f, 80.0f, 0.0f));
+       block_transform = glm::scale(block_transform, glm::vec3(50.0f));
+       block_transform = glm::rotate(block_transform, 3.5f, glm::vec3(1.0f, 0.0f, 0.0f));
+       block_transform = glm::rotate(block_transform, 0.85f, glm::vec3(0.0f, 1.0f, 0.0f));
+
+       crosshair.vertices = std::vector<glm::vec3>({
+               { -10.0f,   0.0f, 0.0f }, { 10.0f,  0.0f, 0.0f },
+               {   0.0f, -10.0f, 0.0f }, {  0.0f, 10.0f, 0.0f },
+       });
+       crosshair.colors.resize(4, { 10.0f, 10.0f, 10.0f });
+       crosshair.Invalidate();
+}
+
+
+void HUD::Viewport(float width, float height) {
+       Viewport(0, 0, width, height);
+}
+
+void HUD::Viewport(float x, float y, float width, float height) {
+       projection = glm::ortho(x, width, height, y, near, far);
+       crosshair_transform = glm::translate(glm::mat4(1.0f), glm::vec3(width * 0.5f, height * 0.5f, 0.0f));
+}
+
+
+void HUD::Display(const BlockType &type) {
+       block.Clear();
+       type.FillModel({ 0.0f, 0.0f, 0.0f }, block);
+       block_visible = type.visible;
+}
+
+
+void HUD::Render(DirectionalLighting &program) {
+       if (block_visible) {
+               program.SetLightDirection({ 1.0f, 3.0f, 5.0f });
+               GLContext::ClearDepthBuffer();
+               program.SetMVP(block_transform, view, projection);
+               block.Draw();
+               program.SetM(crosshair_transform);
+               crosshair.Draw();
+       }
+}
+
+}